All questions of The Science of Life for Grade 9 Exam
Can you explain the answer of this question belowOne of the following functions is exhibited only by green plants and not by animals.A: GrowthB: PhotosynthesisC: DigestionD: ResponseThe answer is b.
One of the following functions is exhibited only by green plants and not by animals.
A: Growth
B: Photosynthesis
C: Digestion
D: Response
|
Mira Joshi answered |
- Photosynthesis is a biochemical process of the synthesis of glucose using light energy. The process of photosynthesis occurs in chloroplast.
- As only green plants have chloroplast hence photosynthesis can occur only in green parts of the plant.
Hence, the corret option is B i.e. Photosynthesis.
A binomial nomenclature has _________ words.- a)One
- b)Five
- c)Two
- d)Three
Correct answer is option 'C'. Can you explain this answer?
A binomial nomenclature has _________ words.
a)
One
b)
Five
c)
Two
d)
Three
|
Vivek Patel answered |
The first word in a biological name represents the genus while the second word denotes the specific epithet.
Hence, the Correct Answer is C
NCERT Reference:
Page no. 7 from chapter 1 of NCERT
Which among the following is not a code of nomenclature for organisms?
- a)International Union of Pure and Applied Chemistry (IUPAC)
- b)International Code of Bacteriological Nomenclature (ICBN)
- c)International Code of Zoological Nomenclature (ICZN)
- d)International Code of Botanical Nomenclature (ICBN)
Correct answer is option 'A'. Can you explain this answer?
Which among the following is not a code of nomenclature for organisms?
a)
International Union of Pure and Applied Chemistry (IUPAC)
b)
International Code of Bacteriological Nomenclature (ICBN)
c)
International Code of Zoological Nomenclature (ICZN)
d)
International Code of Botanical Nomenclature (ICBN)
|
Sanchita Chakraborty answered |
International Union of Pure and Applied Chemistry is for the nomenclature of organic compounds.
- International Code of Botanical Nomenclature (ICBN)
- International Code of Bacteriological Nomenclature (ICBN) and
- International Code of Zoological Nomenclature (ICZN)
These are the three codes of nomenclature for living organisms.
Which of the following is less general in characters as compared to genus?- a)Species
- b)Family
- c)Class
- d)Division
Correct answer is option 'A'. Can you explain this answer?
Which of the following is less general in characters as compared to genus?
a)
Species
b)
Family
c)
Class
d)
Division
|
Shilpa Bose answered |
Less General than Genus: Species
Explanation:
- Genus is a taxonomic rank used in the biological classification of living and fossil organisms.
- It is a more general category than species, which is the basic unit of classification and the lowest taxonomic rank.
- Species is less general than genus because it refers to a specific group of organisms that share common characteristics and can interbreed to produce fertile offspring.
- Family, class, and division are all higher taxonomic ranks than species and therefore more general in nature.
Explanation:
- Genus is a taxonomic rank used in the biological classification of living and fossil organisms.
- It is a more general category than species, which is the basic unit of classification and the lowest taxonomic rank.
- Species is less general than genus because it refers to a specific group of organisms that share common characteristics and can interbreed to produce fertile offspring.
- Family, class, and division are all higher taxonomic ranks than species and therefore more general in nature.
Can you explain the answer of this question below:The biologist who has been called the ‘Darwin of the 20th century’ isA: WhittakerB: DienerC: Ernst MayrD: LinnaeusThe answer is c.
|
Preeti Khanna answered |
- Ernst Mayr was a German-born American who made decisive and groundbreaking contributions to avian taxonomy, evolution and population genetics.
- Widely credited as the world's greatest evolutionary biologist in history, Mayr was fondly called the “Darwin of the 20th century”.
Hence, the correct option is C i.e. Ernst Mayr.
Solanum, Panthera, Homo are examples of:- a)Family
- b)Division
- c)Genera
- d)Species epithet
Correct answer is option 'C'. Can you explain this answer?
Solanum, Panthera, Homo are examples of:
a)
Family
b)
Division
c)
Genera
d)
Species epithet
|
Shalini Khanna answered |
Genera
- Solanum, Panthera, Homo are examples of the scientific classification category called genera.
- Genera is a taxonomic rank used in the biological classification of living and fossil organisms.
- It is the second-lowest rank, just above species, in the hierarchical classification system.
- Genera are groups of closely related species that share a common ancestor and have similar physical characteristics, such as morphology, anatomy, and genetics.
- Each genus is given a unique name, which is written in italics and capitalized.
- The first letter of the genus name is always capitalized, while the species name is written in lowercase.
- The name of the genus is followed by the name of the species, which is called the species epithet or specific epithet.
- The combination of genus and species names is known as the binomial nomenclature, which is used to identify and distinguish each species from others.
- Solanum, Panthera, Homo are examples of the scientific classification category called genera.
- Genera is a taxonomic rank used in the biological classification of living and fossil organisms.
- It is the second-lowest rank, just above species, in the hierarchical classification system.
- Genera are groups of closely related species that share a common ancestor and have similar physical characteristics, such as morphology, anatomy, and genetics.
- Each genus is given a unique name, which is written in italics and capitalized.
- The first letter of the genus name is always capitalized, while the species name is written in lowercase.
- The name of the genus is followed by the name of the species, which is called the species epithet or specific epithet.
- The combination of genus and species names is known as the binomial nomenclature, which is used to identify and distinguish each species from others.
Identify the incorrect statement:
- a)Biological names are generally in Latin and written in italics. They are Latinised or derived from Latin irrespective of their origin.
- b)The first word in a biological name represents the genus while the second component denotes the specific epithet.
- c)Both the words in a biological name, when handwritten, are seperately underlined, or printed in italics to indicate their vernacular origin.
- d)The first word denoting the genus starts with a capital letter while the specific epithet starts with a small letter.
Correct answer is option 'C'. Can you explain this answer?
Identify the incorrect statement:
a)
Biological names are generally in Latin and written in italics. They are Latinised or derived from Latin irrespective of their origin.
b)
The first word in a biological name represents the genus while the second component denotes the specific epithet.
c)
Both the words in a biological name, when handwritten, are seperately underlined, or printed in italics to indicate their vernacular origin.
d)
The first word denoting the genus starts with a capital letter while the specific epithet starts with a small letter.
|
Shreya Menon answered |
Explanation:
In the context of biological names, statement 3 is incorrect. When handwritten, biological names are typically underlined, not separately, but as a whole to indicate their vernacular origin. When printed, biological names are usually written in italics. Underlining individual words in a biological name is not a standard practice.
The correct practice is to underline the entire biological name when handwritten or italicize it when printed.
Therefore, the correct answer is 3. Both the words in a biological name, when handwritten, are not separately underlined, or printed in italics to indicate their vernacular origin.
Can you explain the answer of this question below:The maintenance of constant temperature inside the body is an example ofA:HomoeostasisB:Negative feedback loopC:Both A and BD:None of theseThe answer is a.
|
Anjali Iyer answered |
Homeostasis is how the body keeps conditions inside it the same. Scientists describe it as the maintenance of a constant internal environment. Two examples of things that the body keeps the same are: body temperature at 37degC.
Which of the following statements regarding universal rules of nomenclature is incorrect?- a)The first word represents genus and the second word represents species
- b)Biological names are generally in Greek
- c)The biological names are printed in italics
- d)Genus name starts with capital letter while species name starts with small letters
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements regarding universal rules of nomenclature is incorrect?
a)
The first word represents genus and the second word represents species
b)
Biological names are generally in Greek
c)
The biological names are printed in italics
d)
Genus name starts with capital letter while species name starts with small letters
|
|
Arpita Saha answered |
Introduction:
Universal rules of nomenclature are used to name living organisms. It helps to maintain a uniform and standard way of naming organisms. There are certain rules that need to be followed while naming an organism.
Incorrect statement:
The incorrect statement regarding universal rules of nomenclature is option 'B' - Biological names are generally in Greek.
Explanation:
Biological names are not generally in Greek. The biological names are formed using Latin words. Carl Linnaeus, a Swedish botanist, introduced the binomial nomenclature system. According to this system, a two-word name is given to each organism, which includes the genus and the species name.
Following are the correct statements regarding universal rules of nomenclature:
- The first word represents genus and the second word represents species.
- The biological names are printed in italics.
- Genus name starts with a capital letter while the species name starts with small letters.
Conclusion:
Therefore, the incorrect statement regarding universal rules of nomenclature is option 'B', as biological names are not generally in Greek.
Universal rules of nomenclature are used to name living organisms. It helps to maintain a uniform and standard way of naming organisms. There are certain rules that need to be followed while naming an organism.
Incorrect statement:
The incorrect statement regarding universal rules of nomenclature is option 'B' - Biological names are generally in Greek.
Explanation:
Biological names are not generally in Greek. The biological names are formed using Latin words. Carl Linnaeus, a Swedish botanist, introduced the binomial nomenclature system. According to this system, a two-word name is given to each organism, which includes the genus and the species name.
Following are the correct statements regarding universal rules of nomenclature:
- The first word represents genus and the second word represents species.
- The biological names are printed in italics.
- Genus name starts with a capital letter while the species name starts with small letters.
Conclusion:
Therefore, the incorrect statement regarding universal rules of nomenclature is option 'B', as biological names are not generally in Greek.
In five kingdom system, the main basis of classification is
a)Structure of cell wallb)Mode of Nutritionc)Structure of nucleusd)Asexual reproductionCorrect answer is 'B'. Can you explain this answer?
|
Rohit Shah answered |
Among the five kingdom systems, the main, and the most basic form of classification is considered to be the classification according to the mode of nutrition.
This classification is specified as ‘kingdom protista’ i.e. Monera, Protista, Fungi, Plantae and Animalia by R. H. Whittaker, who claimed that the simplest form of unicellular organisms depict both autotrophic and heterotrophic mode of nutrition.
The taxonomic hierarchy, from broadest to most specific, consists of the following categories:
- a)Phylum, Class, Order, Family, Genus, Species
- b)Kingdom, Order, Phylum, Genus, Family, Species
- c)Kingdom, Phylum, Order, Family, Genus, Species
- d)Class, Phylum, Kingdom, Family, Genus, Species
Correct answer is option 'C'. Can you explain this answer?
The taxonomic hierarchy, from broadest to most specific, consists of the following categories:
a)
Phylum, Class, Order, Family, Genus, Species
b)
Kingdom, Order, Phylum, Genus, Family, Species
c)
Kingdom, Phylum, Order, Family, Genus, Species
d)
Class, Phylum, Kingdom, Family, Genus, Species
|
Poulomi Roy answered |
Botanical gardens and zoological parks are places where people can go to observe and learn about different species of plants and animals. These places have a collection of different living species. Let's discuss the answer option by option:
a) Collection of endemic living species only:
- Endemic species are those that are native to a particular region or habitat.
- If a botanical garden or zoological park had a collection of only endemic species, it would mean that they only have plants and animals that are found naturally in that specific area.
- This would limit the diversity of the collection and make it less interesting for visitors.
b) Collection of exotic living species only:
- Exotic species are those that are not native to a particular region or habitat.
- If a botanical garden or zoological park had a collection of only exotic species, it would mean that they only have plants and animals that are not found naturally in that specific area.
- This may make the collection more interesting for visitors, but it would not showcase the biodiversity of the local area.
c) Collection of endemic and exotic living species:
- Having a collection of both endemic and exotic species allows for a greater diversity of plants and animals for visitors to observe and learn about.
- This also allows for a comparison between the local species and those from other regions, highlighting the uniqueness of each species.
d) Collection of only local plants and animals:
- Having a collection of only local plants and animals can be educational for visitors, as they can learn about the biodiversity of the local area.
- However, it may not be as interesting for visitors who are looking for a wider variety of plants and animals to observe and learn about.
In conclusion, the correct answer is option C, as having a collection of both endemic and exotic living species provides visitors with a diverse and interesting experience, while also highlighting the uniqueness of each species.
a) Collection of endemic living species only:
- Endemic species are those that are native to a particular region or habitat.
- If a botanical garden or zoological park had a collection of only endemic species, it would mean that they only have plants and animals that are found naturally in that specific area.
- This would limit the diversity of the collection and make it less interesting for visitors.
b) Collection of exotic living species only:
- Exotic species are those that are not native to a particular region or habitat.
- If a botanical garden or zoological park had a collection of only exotic species, it would mean that they only have plants and animals that are not found naturally in that specific area.
- This may make the collection more interesting for visitors, but it would not showcase the biodiversity of the local area.
c) Collection of endemic and exotic living species:
- Having a collection of both endemic and exotic species allows for a greater diversity of plants and animals for visitors to observe and learn about.
- This also allows for a comparison between the local species and those from other regions, highlighting the uniqueness of each species.
d) Collection of only local plants and animals:
- Having a collection of only local plants and animals can be educational for visitors, as they can learn about the biodiversity of the local area.
- However, it may not be as interesting for visitors who are looking for a wider variety of plants and animals to observe and learn about.
In conclusion, the correct answer is option C, as having a collection of both endemic and exotic living species provides visitors with a diverse and interesting experience, while also highlighting the uniqueness of each species.
The book 'Systema Nature' was written by:- a)Linnaeus
- b)Haeckel
- c)Whittaker
- d)Robert Brown
Correct answer is option 'A'. Can you explain this answer?
The book 'Systema Nature' was written by:
a)
Linnaeus
b)
Haeckel
c)
Whittaker
d)
Robert Brown
|
|
Swati Verma answered |
- The book ‘Systema Naturae’ was written by Carolus Linnaeus in 1735. The book marked the beginning of zoological nomenclature.
- Carl Linnaeus is known as the “Father of Modern Taxonomy”.
- In his book “Systema Naturae” (1735), he gave the hierarchical system of classification of the natural world into the plant kingdom, the animal kingdom and mineral kingdom.
A group of interbreeding organisms is called a- a)Genus
- b)Species
- c)Family
- d)Order
Correct answer is option 'B'. Can you explain this answer?
A group of interbreeding organisms is called a
a)
Genus
b)
Species
c)
Family
d)
Order
|
|
Nandini Patel answered |
Species - A group of organisms that interbreed and produce fertile offspring. population - A group of organisms of the same species living in the same area at the same time, and which are capable of interbreeding. community - A group of populations living and interacting with each other in a common habitat.
In a hierarchical system of classification of plants, which of the following taxonomic rank ends in ‘aceae’?- a)Class
- b)Order
- c)Family
- d)Genus
Correct answer is option 'C'. Can you explain this answer?
In a hierarchical system of classification of plants, which of the following taxonomic rank ends in ‘aceae’?
a)
Class
b)
Order
c)
Family
d)
Genus
|
|
Gargi Ahuja answered |
Species?
The taxonomic rank that ends in species is the lowest rank in the hierarchical system of classification of plants. It is called the "species" rank.
The taxonomic rank that ends in species is the lowest rank in the hierarchical system of classification of plants. It is called the "species" rank.
The scientific name of an organism is written in:
- a)Italic or underlined letters
- b)Capital letters
- c)Bold letters
- d)Small letters
Correct answer is option 'A'. Can you explain this answer?
The scientific name of an organism is written in:
a)
Italic or underlined letters
b)
Capital letters
c)
Bold letters
d)
Small letters
|
|
Asha Chauhan answered |
National Botanical Research Institute (NBRI) is situated at Lucknow.
Explanation:
National Botanical Research Institute (NBRI) is a research institute located in Lucknow, Uttar Pradesh. It was established in 1953 and is one of the premier institutions of the Council of Scientific and Industrial Research (CSIR). The institute is involved in research in the fields of plant sciences, biotechnology, and environmental biology. NBRI is also responsible for the conservation and documentation of India's plant wealth. It houses a herbarium with over one million plant specimens and a botanical garden with various plant species. Therefore, option A is the correct answer.
Explanation:
National Botanical Research Institute (NBRI) is a research institute located in Lucknow, Uttar Pradesh. It was established in 1953 and is one of the premier institutions of the Council of Scientific and Industrial Research (CSIR). The institute is involved in research in the fields of plant sciences, biotechnology, and environmental biology. NBRI is also responsible for the conservation and documentation of India's plant wealth. It houses a herbarium with over one million plant specimens and a botanical garden with various plant species. Therefore, option A is the correct answer.
A taxon can be defined as _________- a)a group of related families
- b)a taxonomic group of any ranking
- c)a group of related species
- d)the number and type of organisms present on Earth
Correct answer is option 'B'. Can you explain this answer?
A taxon can be defined as _________
a)
a group of related families
b)
a taxonomic group of any ranking
c)
a group of related species
d)
the number and type of organisms present on Earth
|
Prashanth Menon answered |
Taxon is a term used in biological classification and refers to a taxonomic group of any ranking. It is used to classify living organisms into categories based on their characteristics, evolutionary history, and relationships to other organisms. Taxonomy is the science of naming, describing, and classifying organisms based on their characteristics and evolutionary relationships.
Types of Taxonomic Ranks
Taxonomic ranks are hierarchical levels of classification used to group organisms based on their characteristics, evolutionary history, and relationships to other organisms. The different types of taxonomic ranks are:
1. Domain
2. Kingdom
3. Phylum
4. Class
5. Order
6. Family
7. Genus
8. Species
Each rank is divided into smaller subcategories, providing a systematic framework for organizing and categorizing the diversity of life on Earth.
Importance of Taxonomy
Taxonomy is important because it helps scientists understand the diversity of life on Earth, how organisms are related to each other, and how they have evolved over time. It provides a way to organize and classify organisms into groups based on their characteristics and evolutionary relationships.
Taxonomy also helps scientists identify and name new species, and it provides a standardized system for communicating information about organisms. This is important for conservation efforts, as it allows researchers to identify and protect endangered species and ecosystems.
Conclusion
In conclusion, a taxon is a taxonomic group of any ranking used to classify living organisms based on their characteristics, evolutionary history, and relationships to other organisms. Taxonomy is an important field of study that provides a systematic framework for organizing and categorizing the diversity of life on Earth.
Types of Taxonomic Ranks
Taxonomic ranks are hierarchical levels of classification used to group organisms based on their characteristics, evolutionary history, and relationships to other organisms. The different types of taxonomic ranks are:
1. Domain
2. Kingdom
3. Phylum
4. Class
5. Order
6. Family
7. Genus
8. Species
Each rank is divided into smaller subcategories, providing a systematic framework for organizing and categorizing the diversity of life on Earth.
Importance of Taxonomy
Taxonomy is important because it helps scientists understand the diversity of life on Earth, how organisms are related to each other, and how they have evolved over time. It provides a way to organize and classify organisms into groups based on their characteristics and evolutionary relationships.
Taxonomy also helps scientists identify and name new species, and it provides a standardized system for communicating information about organisms. This is important for conservation efforts, as it allows researchers to identify and protect endangered species and ecosystems.
Conclusion
In conclusion, a taxon is a taxonomic group of any ranking used to classify living organisms based on their characteristics, evolutionary history, and relationships to other organisms. Taxonomy is an important field of study that provides a systematic framework for organizing and categorizing the diversity of life on Earth.
Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus.
- a)Mangifera indica
- b)Mangifera indica Car. Linn.
- c)Mangifera Indica Lin
- d)Mangifera indica Linn
Correct answer is option 'D'. Can you explain this answer?
Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus.
a)
Mangifera indica
b)
Mangifera indica
Car. Linn.
c)
Mangifera Indica
Lin
d)
Mangifera indica Linn
|
|
Naina Dey answered |
Scientific Name of Mango
The correct scientific name of Mango which was first described by Carolus Linnaeus is "Mangifera indica Linn."
Explanation
- The scientific name of a species consists of two parts - the genus name and the specific epithet. The genus name always starts with a capital letter, while the specific epithet is written in lowercase.
- Carolus Linnaeus, also known as Carl Linnaeus, was a Swedish botanist who is known for his work in developing the modern system of naming organisms called binomial nomenclature.
- In 1753, Linnaeus described the Mango plant and gave it the scientific name Mangifera indica. The species name "indica" means "of India," which is where Mango is believed to have originated.
- The abbreviation "Linn." after the species name indicates that Linnaeus is the author who first described the species.
- The correct way to write the scientific name for Mango is "Mangifera indica Linn." with a period after the abbreviation for Linnaeus.
The correct scientific name of Mango which was first described by Carolus Linnaeus is "Mangifera indica Linn."
Explanation
- The scientific name of a species consists of two parts - the genus name and the specific epithet. The genus name always starts with a capital letter, while the specific epithet is written in lowercase.
- Carolus Linnaeus, also known as Carl Linnaeus, was a Swedish botanist who is known for his work in developing the modern system of naming organisms called binomial nomenclature.
- In 1753, Linnaeus described the Mango plant and gave it the scientific name Mangifera indica. The species name "indica" means "of India," which is where Mango is believed to have originated.
- The abbreviation "Linn." after the species name indicates that Linnaeus is the author who first described the species.
- The correct way to write the scientific name for Mango is "Mangifera indica Linn." with a period after the abbreviation for Linnaeus.
It is a handy book containing instructions of occurrence, collection and identification of species found in a particular area.- a)Key
- b)Manual
- c)Monograph
- d)Flora
Correct answer is option 'B'. Can you explain this answer?
It is a handy book containing instructions of occurrence, collection and identification of species found in a particular area.
a)
Key
b)
Manual
c)
Monograph
d)
Flora
|
|
Megha Das answered |
The correct answer is option 'B', which is a manual.
Explanation:
A manual is a book that contains instructions or information about a particular subject. In this case, the manual is a handy book that provides instructions for the occurrence, collection, and identification of species found in a particular area.
Key, Flora, and Monograph are also related to identifying species, but they have different meanings:
- A Key is a tool used to identify an unknown species by answering a series of yes or no questions.
- Flora is a comprehensive listing of all plant species found in a particular area.
- Monograph is a detailed written study of a particular group of organisms, often focusing on their taxonomy, distribution, and characteristics.
Therefore, the best answer for a book containing instructions for the occurrence, collection, and identification of species found in a particular area is a manual.
Explanation:
A manual is a book that contains instructions or information about a particular subject. In this case, the manual is a handy book that provides instructions for the occurrence, collection, and identification of species found in a particular area.
Key, Flora, and Monograph are also related to identifying species, but they have different meanings:
- A Key is a tool used to identify an unknown species by answering a series of yes or no questions.
- Flora is a comprehensive listing of all plant species found in a particular area.
- Monograph is a detailed written study of a particular group of organisms, often focusing on their taxonomy, distribution, and characteristics.
Therefore, the best answer for a book containing instructions for the occurrence, collection, and identification of species found in a particular area is a manual.
Binomial nomenclature was given byA: TheophrastusB: LinnaeusC: R. H. WhittakerD: AristotleThe correct answer is b.
Can you explain this?
Can you explain this?
|
|
Vijay Bansal answered |
Binomial Nomenclature was formly introduced by Swedish scientist Carl Linnaeus. In the binomial Nomenclature two terms are used to debote a species of living organisms, the first one indicate the genus and second one the specific epihet.Example:-Homo sapiens is the scientific name of human.
The branch connected with nomenclature, identification and classification is- a)Ecology
- b)Taxonomy
- c)Physiology
- d)Morphology
Correct answer is option 'B'. Can you explain this answer?
The branch connected with nomenclature, identification and classification is
a)
Ecology
b)
Taxonomy
c)
Physiology
d)
Morphology
|
|
Anita Menon answered |
Taxonomy is the practice of identifying different organisms, classifying them into categories and naming them.
So, the first step in taxonomy would be identification.
We would first identify the organisms, classify them, note down their characteristics and then give the scientific names.
So, the correct order would be-
- Identification
- Classification
- Characterization
- Nomenclature
The Darwin of 20th century is:- a)Aristotle
- b)Ernst Mayr
- c)Carolus Linnaeus
- d)Theophrastus
Correct answer is option 'B'. Can you explain this answer?
The Darwin of 20th century is:
a)
Aristotle
b)
Ernst Mayr
c)
Carolus Linnaeus
d)
Theophrastus
|
|
Shraddha Sharma answered |
The Darwin of 20th century is Ernst Mayr.
Ernst Mayr was a German-American biologist and ornithologist who is considered as the "Darwin of 20th century" due to his significant contributions to the field of evolutionary biology. He was born in 1904 in Kempten, Germany and died in 2005 in Bedford, Massachusetts, United States.
Contributions to Evolutionary Biology:
1. Biological Species Concept: Mayr introduced the Biological Species Concept which defined a species as a group of individuals that can interbreed and produce viable offspring. This concept is widely accepted in the field of evolutionary biology.
2. Evolutionary Synthesis: Mayr played a crucial role in the development of the Evolutionary Synthesis, which was a unification of genetics and evolutionary biology. He proposed that the evolution of new species occurred due to the accumulation of genetic changes over time.
3. Geographic Speciation: Mayr proposed the theory of geographic speciation, which suggests that the formation of new species occurs when a population is geographically isolated from the parent population.
4. Ornithology: Mayr was also an accomplished ornithologist and contributed significantly to the study of bird species. He proposed the theory of allopatric speciation in birds, which suggests that the formation of new bird species occurs due to geographic isolation.
5. Systematics: Mayr made significant contributions to the field of systematics, which is the study of the classification of living organisms. He proposed the concept of "cladistics", which is a method of classification that groups organisms based on their evolutionary history.
Conclusion:
Ernst Mayr's contributions to the field of evolutionary biology have had a significant impact on our understanding of the process of evolution. His work has helped to shape the field of evolutionary biology and has influenced generations of biologists. Therefore, it is justified to consider him as the "Darwin of 20th century".
Ernst Mayr was a German-American biologist and ornithologist who is considered as the "Darwin of 20th century" due to his significant contributions to the field of evolutionary biology. He was born in 1904 in Kempten, Germany and died in 2005 in Bedford, Massachusetts, United States.
Contributions to Evolutionary Biology:
1. Biological Species Concept: Mayr introduced the Biological Species Concept which defined a species as a group of individuals that can interbreed and produce viable offspring. This concept is widely accepted in the field of evolutionary biology.
2. Evolutionary Synthesis: Mayr played a crucial role in the development of the Evolutionary Synthesis, which was a unification of genetics and evolutionary biology. He proposed that the evolution of new species occurred due to the accumulation of genetic changes over time.
3. Geographic Speciation: Mayr proposed the theory of geographic speciation, which suggests that the formation of new species occurs when a population is geographically isolated from the parent population.
4. Ornithology: Mayr was also an accomplished ornithologist and contributed significantly to the study of bird species. He proposed the theory of allopatric speciation in birds, which suggests that the formation of new bird species occurs due to geographic isolation.
5. Systematics: Mayr made significant contributions to the field of systematics, which is the study of the classification of living organisms. He proposed the concept of "cladistics", which is a method of classification that groups organisms based on their evolutionary history.
Conclusion:
Ernst Mayr's contributions to the field of evolutionary biology have had a significant impact on our understanding of the process of evolution. His work has helped to shape the field of evolutionary biology and has influenced generations of biologists. Therefore, it is justified to consider him as the "Darwin of 20th century".
Full form of ICBN is:
- a)International Code for Botanical Nomenclature
- b)International Class for Botanical Nomenclature
- c)Indian Code for Botanical Nomenclature
- d)Indian Conduct of Biological Nomenclature
Correct answer is option 'A'. Can you explain this answer?
Full form of ICBN is:
a)
International Code for Botanical Nomenclature
b)
International Class for Botanical Nomenclature
c)
Indian Code for Botanical Nomenclature
d)
Indian Conduct of Biological Nomenclature
|
|
Pooja Desai answered |
The full form of ICBN is the International Code for Botanical Nomenclature. It is the set of rules and recommendations for naming plants, algae, and fungi. The aim of the ICBN is to ensure that each organism has a unique and stable name that is recognized internationally.
History of ICBN:
- The first edition of the ICBN was published in 1906.
- It was revised several times, with the latest edition being the 2012 Vienna Code.
- The ICBN is maintained by the International Association for Plant Taxonomy (IAPT).
Rules of ICBN:
- The ICBN lays down rules for the formation and use of names for plants, algae, and fungi. It provides guidelines for naming new taxa, for the recognition of names that have already been published, and for the correction of errors.
- The ICBN also provides guidelines for the citation of names, for the use of ranks, and for the establishment of type specimens.
- It lays down rules for the use of diacritical marks, accents, and special characters in names.
Importance of ICBN:
- The ICBN is important because it provides a standardized system for naming plants, algae, and fungi.
- It ensures that each organism has a unique and stable name that is recognized internationally.
- The ICBN helps to avoid confusion and ambiguity in the naming of plants, algae, and fungi.
- It also helps to ensure that the names of plants, algae, and fungi are stable and do not change unnecessarily.
Conclusion:
The ICBN is an important set of rules and recommendations for naming plants, algae, and fungi. It provides a standardized system for naming these organisms, ensuring that each organism has a unique and stable name that is recognized internationally. The ICBN helps to avoid confusion and ambiguity in the naming of plants, algae, and fungi, and helps to ensure that the names of these organisms are stable and do not change unnecessarily.
History of ICBN:
- The first edition of the ICBN was published in 1906.
- It was revised several times, with the latest edition being the 2012 Vienna Code.
- The ICBN is maintained by the International Association for Plant Taxonomy (IAPT).
Rules of ICBN:
- The ICBN lays down rules for the formation and use of names for plants, algae, and fungi. It provides guidelines for naming new taxa, for the recognition of names that have already been published, and for the correction of errors.
- The ICBN also provides guidelines for the citation of names, for the use of ranks, and for the establishment of type specimens.
- It lays down rules for the use of diacritical marks, accents, and special characters in names.
Importance of ICBN:
- The ICBN is important because it provides a standardized system for naming plants, algae, and fungi.
- It ensures that each organism has a unique and stable name that is recognized internationally.
- The ICBN helps to avoid confusion and ambiguity in the naming of plants, algae, and fungi.
- It also helps to ensure that the names of plants, algae, and fungi are stable and do not change unnecessarily.
Conclusion:
The ICBN is an important set of rules and recommendations for naming plants, algae, and fungi. It provides a standardized system for naming these organisms, ensuring that each organism has a unique and stable name that is recognized internationally. The ICBN helps to avoid confusion and ambiguity in the naming of plants, algae, and fungi, and helps to ensure that the names of these organisms are stable and do not change unnecessarily.
One of the following functions is exhibited only by green plants and not by animals.- a)Growth
- b)Photosynthesis
- c)Digestion
- d)Response
Correct answer is option 'B'. Can you explain this answer?
One of the following functions is exhibited only by green plants and not by animals.
a)
Growth
b)
Photosynthesis
c)
Digestion
d)
Response
|
|
Om Desai answered |
- Photosynthesis is a biochemical process of the synthesis of glucose using light energy. The process of photosynthesis occurs in chloroplasts.
- As only green plants have chloroplasts hence photosynthesis can occur only in green parts of the plant.
Hence, the corret option is B i.e. Photosynthesis.
The expansion of ICZN is:- a)Indian Code of Zoological Nomenclature
- b)International Code of Zoological Nomenclature
- c)Indian Class of Zoological Nomenclature
- d)International Class of Zoological Nomenclature
Correct answer is option 'B'. Can you explain this answer?
The expansion of ICZN is:
a)
Indian Code of Zoological Nomenclature
b)
International Code of Zoological Nomenclature
c)
Indian Class of Zoological Nomenclature
d)
International Class of Zoological Nomenclature
|
|
Anushka Kumar answered |
International Code of Zoological Nomenclature (ICZN) is the correct expansion.
Explanation:
The International Code of Zoological Nomenclature (ICZN) is a set of rules and guidelines established to regulate the use of scientific names for animals. It was first published in 1901 and has been updated several times to reflect changes in scientific knowledge and practices.
The ICZN is designed to ensure that each species has a unique, stable, and recognizable name that is widely accepted by the scientific community. It provides guidelines for the creation, spelling, and use of scientific names, as well as rules for resolving conflicts when different names are proposed for the same species.
The ICZN is maintained by the International Commission on Zoological Nomenclature (ICZN), which is responsible for interpreting and enforcing the rules of the code. The ICZN is recognized as the official code of nomenclature for animals by most countries and scientific organizations around the world.
In summary, the ICZN is an internationally recognized set of rules and guidelines for the naming of animals, designed to ensure that each species has a unique and stable name that is widely accepted by the scientific community.
Explanation:
The International Code of Zoological Nomenclature (ICZN) is a set of rules and guidelines established to regulate the use of scientific names for animals. It was first published in 1901 and has been updated several times to reflect changes in scientific knowledge and practices.
The ICZN is designed to ensure that each species has a unique, stable, and recognizable name that is widely accepted by the scientific community. It provides guidelines for the creation, spelling, and use of scientific names, as well as rules for resolving conflicts when different names are proposed for the same species.
The ICZN is maintained by the International Commission on Zoological Nomenclature (ICZN), which is responsible for interpreting and enforcing the rules of the code. The ICZN is recognized as the official code of nomenclature for animals by most countries and scientific organizations around the world.
In summary, the ICZN is an internationally recognized set of rules and guidelines for the naming of animals, designed to ensure that each species has a unique and stable name that is widely accepted by the scientific community.
Homo sapiens belong to the genus ________
- a)Hominidae
- b) Mammalia
- c)Homo
- d) Sapiens
Correct answer is option 'C'. Can you explain this answer?
Homo sapiens belong to the genus ________
a)
Hominidae
b)
Mammalia
c)
Homo
d)
Sapiens
|
|
Lekshmi Roy answered |
IUCN, the International Union for Conservation of Nature, has identified Kew, Royal Botanical Garden as a site with a significant number of rare, threatened, and endangered species. According to IUCN, there are around 2,700 such species present in Kew, which is the correct answer to the question.
Explanation:
IUCN is an international organization that works towards conserving the environment and natural resources. One of its key objectives is to identify species that are at risk of extinction and take measures to protect them. Kew, Royal Botanical Garden is one of the sites that IUCN has identified as having a high concentration of rare, threatened, and endangered species.
The number of such species present in Kew is significant, with around 2,700 species falling under this category. This makes Kew an important site for conservation efforts, as protecting these species is crucial for maintaining biodiversity and ecological balance.
Conservation efforts at Kew:
Kew, Royal Botanical Garden, has been actively involved in conservation efforts for many years. The garden has a dedicated team of scientists and researchers who work towards protecting rare and endangered species. Some of the measures taken by Kew to conserve these species include:
- Conducting research to understand the threats faced by these species
- Developing conservation strategies and action plans
- Establishing seed banks and living collections to preserve plant species
- Collaborating with other institutions and organizations to share knowledge and resources
- Engaging with local communities and stakeholders to raise awareness about the importance of conservation.
Conclusion:
Kew, Royal Botanical Garden, is an important site for conservation efforts, with a significant number of rare, threatened, and endangered species present. IUCN's identification of Kew as a site with high conservation value underscores the importance of protecting these species for maintaining biodiversity and ecological balance. The conservation efforts undertaken by Kew and other institutions are crucial for ensuring the survival of these species for future generations.
Explanation:
IUCN is an international organization that works towards conserving the environment and natural resources. One of its key objectives is to identify species that are at risk of extinction and take measures to protect them. Kew, Royal Botanical Garden is one of the sites that IUCN has identified as having a high concentration of rare, threatened, and endangered species.
The number of such species present in Kew is significant, with around 2,700 species falling under this category. This makes Kew an important site for conservation efforts, as protecting these species is crucial for maintaining biodiversity and ecological balance.
Conservation efforts at Kew:
Kew, Royal Botanical Garden, has been actively involved in conservation efforts for many years. The garden has a dedicated team of scientists and researchers who work towards protecting rare and endangered species. Some of the measures taken by Kew to conserve these species include:
- Conducting research to understand the threats faced by these species
- Developing conservation strategies and action plans
- Establishing seed banks and living collections to preserve plant species
- Collaborating with other institutions and organizations to share knowledge and resources
- Engaging with local communities and stakeholders to raise awareness about the importance of conservation.
Conclusion:
Kew, Royal Botanical Garden, is an important site for conservation efforts, with a significant number of rare, threatened, and endangered species present. IUCN's identification of Kew as a site with high conservation value underscores the importance of protecting these species for maintaining biodiversity and ecological balance. The conservation efforts undertaken by Kew and other institutions are crucial for ensuring the survival of these species for future generations.
Choose the correct answers from the alternatives given.
Which of the following is the correct order of classification?- a)Domain - Kingdom - Phylum - Class - Order - Family- Genus - Species
- b)Kingdom - Domain - Class - Phylum - Order - Family - Genus - Species
- c)Kingdom - Domain - Class - Phylum - Order - Genus - Species - Family
- d)Kingdom - Class - Phylum - Domain - Genus - Order - Family - Species
Correct answer is option 'A'. Can you explain this answer?
Choose the correct answers from the alternatives given.
Which of the following is the correct order of classification?
Which of the following is the correct order of classification?
a)
Domain - Kingdom - Phylum - Class - Order - Family- Genus - Species
b)
Kingdom - Domain - Class - Phylum - Order - Family - Genus - Species
c)
Kingdom - Domain - Class - Phylum - Order - Genus - Species - Family
d)
Kingdom - Class - Phylum - Domain - Genus - Order - Family - Species
|
|
Dev Patel answered |
The 8 levels of modern taxonomy classification systems are Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
The basic unit of classification is:- a)Species
- b)Phylum
- c)Genus
- d)Family
Correct answer is option 'A'. Can you explain this answer?
The basic unit of classification is:
a)
Species
b)
Phylum
c)
Genus
d)
Family
|
Anshika Mishra answered |
The Basic Unit of Classification:
The basic unit of classification is the species.
Explanation:
Species is the fundamental unit of classification in biology. It is defined as a group of individuals that can interbreed and produce fertile offspring.
Other taxonomic units such as genus, family, phylum, etc. are based on various characteristics of the organisms, but they all ultimately boil down to the species level.
Here are some of the reasons why species is considered the basic unit of classification:
1. Reproductive isolation: Members of the same species can interbreed and produce viable offspring, whereas members of different species cannot. This reproductive isolation is a crucial criterion for defining a species.
2. Evolutionary lineage: Species are also defined based on their evolutionary history and relationships. Organisms that share a common ancestor are grouped together into a species, and those that diverged earlier or later are classified into different species.
3. Practicality: The species level is also a practical unit of classification because it is often easier to identify and study individual organisms than larger groups.
In summary, the species is the basic unit of classification in biology because it represents a group of individuals that can interbreed and share a common evolutionary history.
The basic unit of classification is the species.
Explanation:
Species is the fundamental unit of classification in biology. It is defined as a group of individuals that can interbreed and produce fertile offspring.
Other taxonomic units such as genus, family, phylum, etc. are based on various characteristics of the organisms, but they all ultimately boil down to the species level.
Here are some of the reasons why species is considered the basic unit of classification:
1. Reproductive isolation: Members of the same species can interbreed and produce viable offspring, whereas members of different species cannot. This reproductive isolation is a crucial criterion for defining a species.
2. Evolutionary lineage: Species are also defined based on their evolutionary history and relationships. Organisms that share a common ancestor are grouped together into a species, and those that diverged earlier or later are classified into different species.
3. Practicality: The species level is also a practical unit of classification because it is often easier to identify and study individual organisms than larger groups.
In summary, the species is the basic unit of classification in biology because it represents a group of individuals that can interbreed and share a common evolutionary history.
All living organisms are capable of - a)Reproduction and Photosynthesis
- b)Locomotion and Respiration
- c)Excretion and Locomotion
- d)Respiration and Excretion
Correct answer is option 'D'. Can you explain this answer?
All living organisms are capable of
a)
Reproduction and Photosynthesis
b)
Locomotion and Respiration
c)
Excretion and Locomotion
d)
Respiration and Excretion
|
|
Dev Patel answered |
All living organisms respire and excrete. Locomotion is movement of an organism from one place to another. Plants cannot locomotate.
Genus has- a)More common character possessing group of one species than other species
- b)More common character possessing group of species than species of other genera
- c)Less common character possessing group of species than other phyla
- d)Less common character possessing group of one species than other species
Correct answer is option 'B'. Can you explain this answer?
Genus has
a)
More common character possessing group of one species than other species
b)
More common character possessing group of species than species of other genera
c)
Less common character possessing group of species than other phyla
d)
Less common character possessing group of one species than other species
|
Orion Classes answered |
To understand the concept of genus in taxonomy:
- A genus typically comprises a group of species sharing more common characteristics among themselves than with species from other genera.
- This distinction helps in classifying organisms into related groups based on similarities in traits.
- Therefore, the correct answer is B: "More common character possessing group of species than species of other genera." This choice highlights the defining feature of a genus in taxonomy.
- A genus typically comprises a group of species sharing more common characteristics among themselves than with species from other genera.
- This distinction helps in classifying organisms into related groups based on similarities in traits.
- Therefore, the correct answer is B: "More common character possessing group of species than species of other genera." This choice highlights the defining feature of a genus in taxonomy.
Which one of the following includes all the other lower taxa?- a)Class
- b)Order
- c)Genus
- d)Species
Correct answer is option 'A'. Can you explain this answer?
Which one of the following includes all the other lower taxa?
a)
Class
b)
Order
c)
Genus
d)
Species
|
Gaurav Kumar answered |
The taxonomic ranks in descending order are domain, kingdom, phylum, class, order, family, genus and species. Higher taxon will comprise broader characteristic features and include features of its lower taxa. As a class would include order, family, genus and species.
The maintenance of constant temperature inside the body is an example of- a)Homoeostasis
- b)Negative feedback loop
- c)Both A and B
- d)None of these
Correct answer is 'B'. Can you explain this answer?
The maintenance of constant temperature inside the body is an example of
a)
Homoeostasis
b)
Negative feedback loop
c)
Both A and B
d)
None of these
|
Pallavi Chopra answered |
Homeostasis maintains optimal conditions for enzyme action throughout the body, as well as all cell functions. It is the maintenance of a constant internal environment despite changes in internal and external conditions. In the human body, these include the control of blood glucose concentration.
Systematics includes- a)Identification
- b)Taxonomy
- c)Classification
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Systematics includes
a)
Identification
b)
Taxonomy
c)
Classification
d)
All of the above
|
|
Preeti Iyer answered |
Systematics is the study of the identification, taxonomy and nomenclature of organisms, including the classification of living things with regard to their natural relationships and the study of variation and the evolution of taxa. A major goal of biological classification systems is to reflect evolutionary relationships among organisms. Knowing phylogenetic relationships is essential for interpreting the evolution of traits of organisms.
Systematic enumeration of plant species occurring in a given region is called:- a)Flora
- b)Fauna
- c)Monograph
- d)Manual
Correct answer is option 'A'. Can you explain this answer?
Systematic enumeration of plant species occurring in a given region is called:
a)
Flora
b)
Fauna
c)
Monograph
d)
Manual
|
|
Meera Singh answered |
Flora: The plant species that grow in a particular region generally naturally occurring.
Mixture of yeast, sugar and water was taken in a test tube. After one hour, bubbles were observed in the mixture. The formation of bubbles was due to- a)Respiration
- b)Photosynthesis
- c)Digestion
- d)Excretion
Correct answer is 'A'. Can you explain this answer?
Mixture of yeast, sugar and water was taken in a test tube. After one hour, bubbles were observed in the mixture. The formation of bubbles was due to
a)
Respiration
b)
Photosynthesis
c)
Digestion
d)
Excretion
|
Ruchi Basak answered |
The formation of bubble was due to production of CO2 & hence answer should be respiration as in respiration only breakdown of nutrients occur.
Order…….. and primate comes under class……- a)Carnivora, mammalia
- b)Diptera, Reptilia
- c)Poals, Reptilia
- d)Diptera, mammalia
Correct answer is option 'A'. Can you explain this answer?
a)
Carnivora, mammalia
b)
Diptera, Reptilia
c)
Poals, Reptilia
d)
Diptera, mammalia
|
Lead Academy answered |
Primates belong to the class Mammalia, and the correct order for mammals that includes animals like cats and dogs is Carnivora.
Other options are incorrect because they mention incorrect combinations of order and class.
Other options are incorrect because they mention incorrect combinations of order and class.
One of the following functions is exhibited only by green plants and not by animals.- a)Growth
- b)Photosynthesis
- c)Digestion
- d)Response
Correct answer is 'B'. Can you explain this answer?
One of the following functions is exhibited only by green plants and not by animals.
a)
Growth
b)
Photosynthesis
c)
Digestion
d)
Response
|
|
Anjali Iyer answered |
Photosynthesis takes place inside plant cells in small things called chloroplasts. Chloroplasts contain a green substance called chlorophyll. This absorbs the light energy needed to make photosynthesis happen.
What is the primary purpose of the binomial system of nomenclature in biology?- a) To assign a common name to each organism
- b) To identify organisms based on resemblances
- c) To provide a scientific/biological name for each organism
- d) To create a hierarchical system of classification
Correct answer is option 'C'. Can you explain this answer?
What is the primary purpose of the binomial system of nomenclature in biology?
a)
To assign a common name to each organism
b)
To identify organisms based on resemblances
c)
To provide a scientific/biological name for each organism
d)
To create a hierarchical system of classification
|
|
Prashanth Menon answered |
Understanding Binomial Nomenclature
The binomial system of nomenclature is a formal system of naming species that was developed by Carl Linnaeus in the 18th century. This system is essential in biology for several reasons.
Primary Purpose
- The primary purpose of the binomial nomenclature is to provide a **scientific/biological name for each organism**.
Key Features of Binomial Nomenclature
- **Two-Part Naming**: Each organism is given a two-part name — the genus name (capitalized) and the species name (not capitalized), such as *Homo sapiens* for humans.
- **Universality**: This system allows scientists worldwide to communicate about species without confusion, as common names can vary by region and language.
- **Clarity and Precision**: By using Latin or Greek roots for names, the binomial system reduces ambiguity. For example, *Canis lupus* clearly refers to the gray wolf, eliminating potential misunderstandings with other species.
Importance of Scientific Names
- **Identification**: Scientific names enable precise identification of organisms, which is crucial for research, conservation, and education.
- **Classification**: While the primary purpose is naming, the system also fits into a broader hierarchical classification, allowing scientists to categorize organisms into groups based on shared characteristics.
Conclusion
In summary, the binomial system of nomenclature serves as a crucial framework in biology, providing a standardized method to name and classify organisms, ensuring clear and effective communication within the scientific community.
The binomial system of nomenclature is a formal system of naming species that was developed by Carl Linnaeus in the 18th century. This system is essential in biology for several reasons.
Primary Purpose
- The primary purpose of the binomial nomenclature is to provide a **scientific/biological name for each organism**.
Key Features of Binomial Nomenclature
- **Two-Part Naming**: Each organism is given a two-part name — the genus name (capitalized) and the species name (not capitalized), such as *Homo sapiens* for humans.
- **Universality**: This system allows scientists worldwide to communicate about species without confusion, as common names can vary by region and language.
- **Clarity and Precision**: By using Latin or Greek roots for names, the binomial system reduces ambiguity. For example, *Canis lupus* clearly refers to the gray wolf, eliminating potential misunderstandings with other species.
Importance of Scientific Names
- **Identification**: Scientific names enable precise identification of organisms, which is crucial for research, conservation, and education.
- **Classification**: While the primary purpose is naming, the system also fits into a broader hierarchical classification, allowing scientists to categorize organisms into groups based on shared characteristics.
Conclusion
In summary, the binomial system of nomenclature serves as a crucial framework in biology, providing a standardized method to name and classify organisms, ensuring clear and effective communication within the scientific community.
What does the term "taxonomic category" refer to within the context of classification processes?- a)The final step in the classification hierarchy
- b)A unit of classification representing a rank
- c)The overall taxonomic arrangement
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
What does the term "taxonomic category" refer to within the context of classification processes?
a)
The final step in the classification hierarchy
b)
A unit of classification representing a rank
c)
The overall taxonomic arrangement
d)
None of these
|
Stepway Academy answered |
In the realm of classification, a "taxonomic category" specifically denotes a unit of classification that represents a particular rank. This term is commonly known as a "taxon." Each taxonomic category plays a crucial role in organizing organisms according to shared characteristics and evolutionary relationships. By assigning entities to specific taxonomic categories, scientists can create a structured hierarchy that aids in understanding the diversity of life on Earth.
Biological names are ……in ……. and written in ……….- a)Always, latin, italics
- b)Generally, italics, latin
- c)Generally, latin, italics
- d)Always, italics, latin
Correct answer is option 'C'. Can you explain this answer?
Biological names are ……in ……. and written in ……….
a)
Always, latin, italics
b)
Generally, italics, latin
c)
Generally, latin, italics
d)
Always, italics, latin
|
Ambition Institute answered |
Biological names are standardized in scientific nomenclature and are written in Latin for consistency and universal understanding. The correct answer is C: Generally, biological names are written in Latin and italicized. Here's why:
- Biological names are universally identified in Latin for consistency.
- Italicizing the names distinguishes them from regular text.
- This practice aids in clarity and consistency in scientific communication.
- Biological names are universally identified in Latin for consistency.
- Italicizing the names distinguishes them from regular text.
- This practice aids in clarity and consistency in scientific communication.
Biodiversity is:- a)Number and type of organisms present on earth.
- b)Number and type of plants present on earth.
- c)Number and type of animals present on earth.
- d)None of the above.
Correct answer is option 'A'. Can you explain this answer?
Biodiversity is:
a)
Number and type of organisms present on earth.
b)
Number and type of plants present on earth.
c)
Number and type of animals present on earth.
d)
None of the above.
|
|
Vivek Patel answered |
Biodiversity is the term used to describe the variety of life found on Earth and all of the natural processes. This can refer to genetic variation, ecosystem variation, or species variation within an area, biome, or planet. The biodiversity is more concentrated within tropical ecosystems than temperate ecosystems.
Why is taxonomy important in agriculture and forestry?- a)It aids in the conservation and management of plant and animal resources.
- b)It facilitates the production of hybrid crops.
- c)It helps in genetic engineering of plants and trees.
- d)It promotes the use of pesticides.
Correct answer is option 'A'. Can you explain this answer?
Why is taxonomy important in agriculture and forestry?
a)
It aids in the conservation and management of plant and animal resources.
b)
It facilitates the production of hybrid crops.
c)
It helps in genetic engineering of plants and trees.
d)
It promotes the use of pesticides.
|
|
Stepway Academy answered |
Taxonomy helps in understanding and preserving the diversity of plant and animal species, which is essential for conservation and resource management.
What is the significance of taxonomic categories and hierarchy in biology?- a) They represent concrete objects for classification
- b) They denote biological entities solely based on morphology
- c) They highlight the rank and grouping of organisms
- d) They emphasize the number of legs an organism possesses
Correct answer is option 'C'. Can you explain this answer?
What is the significance of taxonomic categories and hierarchy in biology?
a)
They represent concrete objects for classification
b)
They denote biological entities solely based on morphology
c)
They highlight the rank and grouping of organisms
d)
They emphasize the number of legs an organism possesses
|
Top Rankers answered |
Taxonomic categories and hierarchy in biology are crucial for organizing and classifying living organisms. They help in understanding the relationships between different species by grouping them based on shared characteristics. Each rank or taxon in the hierarchy represents a specific unit of classification, allowing scientists to categorize and study organisms more effectively. This system provides a structured way to classify the diversity of life on Earth, from broad categories like kingdoms to specific species, enabling scientists to make sense of the vast array of living organisms.
Assertion (A): Taxonomy is crucial for identifying and classifying the vast diversity of living organisms.Reason (R): The scientific names of organisms are always derived from Latin and consist of two parts.- a)If both Assertion and Reason are true and Reason is the correct explanation of Assertion
- b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- c)If Assertion is true but Reason is false
- d)If both Assertion and Reason are false
Correct answer is option 'C'. Can you explain this answer?
Assertion (A): Taxonomy is crucial for identifying and classifying the vast diversity of living organisms.
Reason (R): The scientific names of organisms are always derived from Latin and consist of two parts.
a)
If both Assertion and Reason are true and Reason is the correct explanation of Assertion
b)
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
c)
If Assertion is true but Reason is false
d)
If both Assertion and Reason are false
|
Rajeev Banerjee answered |
Understanding Taxonomy and Scientific Naming
Taxonomy plays a vital role in the biological sciences, essential for identifying and classifying the numerous living organisms we encounter. This process establishes a systematic framework through which biologists can communicate about different species, ensuring clarity and consistency in naming and classification.
Assertion (A) Explained
- Taxonomy is crucial for:
- Identifying various species
- Classifying them into hierarchical categories
- Understanding the relationships between different organisms
- The vast diversity of life necessitates an organized system to facilitate study and research.
Reason (R) Explained
- The scientific names of organisms, known as binomial nomenclature, are:
- Derived from Latin (or Greek)
- Consist of two parts:
- The genus name
- The species identifier
- This naming system helps in universal identification but is not the reason why taxonomy is important.
Reason for Option 'C'
- The assertion is true as taxonomy is indeed crucial for understanding biological diversity.
- The reason, while true regarding the naming convention, does not explain why taxonomy is essential. It merely highlights a feature of the naming system but does not address the broader significance of classification.
Conclusion
In summary, while both the assertion and reason are true, the reason does not adequately justify the assertion, leading to the conclusion that the correct answer is option 'C': Assertion is true but Reason is false.
Taxonomy plays a vital role in the biological sciences, essential for identifying and classifying the numerous living organisms we encounter. This process establishes a systematic framework through which biologists can communicate about different species, ensuring clarity and consistency in naming and classification.
Assertion (A) Explained
- Taxonomy is crucial for:
- Identifying various species
- Classifying them into hierarchical categories
- Understanding the relationships between different organisms
- The vast diversity of life necessitates an organized system to facilitate study and research.
Reason (R) Explained
- The scientific names of organisms, known as binomial nomenclature, are:
- Derived from Latin (or Greek)
- Consist of two parts:
- The genus name
- The species identifier
- This naming system helps in universal identification but is not the reason why taxonomy is important.
Reason for Option 'C'
- The assertion is true as taxonomy is indeed crucial for understanding biological diversity.
- The reason, while true regarding the naming convention, does not explain why taxonomy is essential. It merely highlights a feature of the naming system but does not address the broader significance of classification.
Conclusion
In summary, while both the assertion and reason are true, the reason does not adequately justify the assertion, leading to the conclusion that the correct answer is option 'C': Assertion is true but Reason is false.
What is incorrect for taxonomic hierarchy?- a)There are 7 obligate and more than 21 intermediate categories
- b)Higher the category, fewer the number of organisms
- c)Lower the category, more the number of common features
- d)Greatest similarity in structure is found in between members of a species
Correct answer is option 'A'. Can you explain this answer?
a)
There are 7 obligate and more than 21 intermediate categories
b)
Higher the category, fewer the number of organisms
c)
Lower the category, more the number of common features
d)
Greatest similarity in structure is found in between members of a species
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Top Rankers answered |
The taxonomic hierarchy generally includes 8 primary categories (kingdom, phylum, class, order, family, genus, species, variety) and not 7 obligate categories.
The other statements are correct, based on the classification system used in biology.
The other statements are correct, based on the classification system used in biology.
Which classification correctly matches the organism "Wheat" with its respective Class and Order?- a)Class - Monocotyledonae, Order - Poales
- b)Class - Dicotyledonae, Order - Sapindales
- c)Class - Insecta, Order - Diptera
- d)Class - Mammalia, Order - Primata
Correct answer is option 'A'. Can you explain this answer?
Which classification correctly matches the organism "Wheat" with its respective Class and Order?
a)
Class - Monocotyledonae, Order - Poales
b)
Class - Dicotyledonae, Order - Sapindales
c)
Class - Insecta, Order - Diptera
d)
Class - Mammalia, Order - Primata
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Lead Academy answered |
Wheat, scientifically grouped under the genus Triticum, falls within the Class Monocotyledonae and the Order Poales. Option A is the correct answer as it accurately matches wheat with its taxonomic classification in terms of class and order.
A group of closely related classes is called:- a)Genus
- b)Phylum
- c)Order
- d)None
Correct answer is option 'B'. Can you explain this answer?
A group of closely related classes is called:
a)
Genus
b)
Phylum
c)
Order
d)
None
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Ambition Institute answered |
- Phylum is one of the major taxonomic ranks, and it represents a high-level grouping of organisms that share certain fundamental characteristics.
- Within a phylum, organisms are further divided into classes, which are more specific and share even more closely related characteristics.
Correct answer is B.
NCERT Reference: Topic - Taxonomy from chapter "The Living world" of NCERT.
NCERT Reference: Topic - Taxonomy from chapter "The Living world" of NCERT.
Line in NCERT: "Classes comprising animals like fishes, amphibians, reptiles, birds along with mammals constitute the next higher category called Phylum."
Which of the following is matched incorrectly:- a)Mangifera: indica
- b)Panthera: tuberosum
- c)Solanum: melongena
- d)Solanum: nigrum
Correct answer is option 'B'. Can you explain this answer?
a)
Mangifera: indica
b)
Panthera: tuberosum
c)
Solanum: melongena
d)
Solanum: nigrum
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Ciel Knowledge answered |
"Mangifera indica" is correct for mango.
"Solanum melongena" is correct for brinjal/eggplant.
"Solanum nigrum" is correct for black nightshade.
"Panthera tuberosum" is incorrect; "Panthera" is a genus for big cats (like lions, tigers), not for potatoes. The correct name for potatoes is "Solanum tuberosum."
"Solanum melongena" is correct for brinjal/eggplant.
"Solanum nigrum" is correct for black nightshade.
"Panthera tuberosum" is incorrect; "Panthera" is a genus for big cats (like lions, tigers), not for potatoes. The correct name for potatoes is "Solanum tuberosum."
Identify the correct family and phylum for Mango.- a)Family - Anacardiaceae, Phylum - Chordata
- b)Family - Poaceae, Phylum - Angiospermae
- c)Family - Muscidae, Phylum - Arthropoda
- d)Family - Anacardiaceae, Phylum - Angiospermae
Correct answer is option 'D'. Can you explain this answer?
a)
Family - Anacardiaceae, Phylum - Chordata
b)
Family - Poaceae, Phylum - Angiospermae
c)
Family - Muscidae, Phylum - Arthropoda
d)
Family - Anacardiaceae, Phylum - Angiospermae
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Maheshwar Iyer answered |
Classification of Mango
Mango (Mangifera indica) is a tropical fruit known for its sweetness and nutritional benefits. Its classification involves understanding its family and phylum.
Phylum: Angiospermae
- Angiospermae, also known as flowering plants, are characterized by having seeds enclosed within a fruit.
- This phylum includes a vast variety of plants, including trees, shrubs, and herbs.
- Mangoes, being fruit-bearing plants, fall under this category, emphasizing their reproductive structure.
Family: Anacardiaceae
- The Anacardiaceae family, commonly known as the cashew or sumac family, includes several well-known fruit-bearing plants.
- This family features not only mangoes but also cashews, pistachios, and poison ivy.
- Members of this family typically produce resinous compounds and exhibit a range of leaf shapes and flower structures.
Why Option D is Correct
- Option D correctly identifies mango’s family as Anacardiaceae and its phylum as Angiospermae.
- This classification provides insight into the evolutionary relationships and characteristics shared among mangoes and related species.
- Other options incorrectly classify mangoes under families and phyla that do not pertain to their actual biological classification.
In summary, mangoes belong to the Anacardiaceae family within the Angiospermae phylum, showcasing their unique position in the plant kingdom. Understanding these classifications is essential for studies in botany and agriculture, especially in the context of fruit cultivation and genetic research.
Mango (Mangifera indica) is a tropical fruit known for its sweetness and nutritional benefits. Its classification involves understanding its family and phylum.
Phylum: Angiospermae
- Angiospermae, also known as flowering plants, are characterized by having seeds enclosed within a fruit.
- This phylum includes a vast variety of plants, including trees, shrubs, and herbs.
- Mangoes, being fruit-bearing plants, fall under this category, emphasizing their reproductive structure.
Family: Anacardiaceae
- The Anacardiaceae family, commonly known as the cashew or sumac family, includes several well-known fruit-bearing plants.
- This family features not only mangoes but also cashews, pistachios, and poison ivy.
- Members of this family typically produce resinous compounds and exhibit a range of leaf shapes and flower structures.
Why Option D is Correct
- Option D correctly identifies mango’s family as Anacardiaceae and its phylum as Angiospermae.
- This classification provides insight into the evolutionary relationships and characteristics shared among mangoes and related species.
- Other options incorrectly classify mangoes under families and phyla that do not pertain to their actual biological classification.
In summary, mangoes belong to the Anacardiaceae family within the Angiospermae phylum, showcasing their unique position in the plant kingdom. Understanding these classifications is essential for studies in botany and agriculture, especially in the context of fruit cultivation and genetic research.
Select the correct sequence of taxonomic categories of Mango in ascending order:- a)Mangifera → Anacardiaceae → Dicotyledonae → Sapindales → Angiospermae
- b)Mangifera → Anacardiaceae → Sapindales → Dicotyledonae → Angiospermae
- c)Angiospermae → Dicotyledonae → Sapindales → Anacardiaceae → Mangifera
- d)Angiospermae → Sapindales → Anacardiaceae → Dicotyledonae → Mangifera
Correct answer is option 'B'. Can you explain this answer?
a)
Mangifera → Anacardiaceae → Dicotyledonae → Sapindales → Angiospermae
b)
Mangifera → Anacardiaceae → Sapindales → Dicotyledonae → Angiospermae
c)
Angiospermae → Dicotyledonae → Sapindales → Anacardiaceae → Mangifera
d)
Angiospermae → Sapindales → Anacardiaceae → Dicotyledonae → Mangifera
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Jay Chauhan answered |
Understanding Taxonomic Hierarchy
Taxonomy is the science of classification of organisms, and it organizes them into hierarchical categories. The correct sequence for the mango (Mangifera indica) in ascending order is crucial for understanding its scientific classification.
Correct Sequence Explained
The correct answer is option 'B':
Mangifera → Anacardiaceae → Sapindales → Dicotyledonae → Angiospermae
Breakdown of Taxonomic Categories
- Mangifera:
- The genus of the mango, which includes various species of mangoes.
- Anacardiaceae:
- The family that Mangifera belongs to. This family includes other plants like cashews and poison ivy.
- Sapindales:
- The order that encompasses several families, including Anacardiaceae. It is a broader classification that groups related families together.
- Dicotyledonae:
- A class of flowering plants (angiosperms) that typically have two embryonic leaves or cotyledons.
- Angiospermae:
- The highest taxonomic category in this sequence, representing all flowering plants. This is the largest group of plants in terms of diversity.
Why Other Options are Incorrect
- Option A: Incorrect as it places Dicotyledonae before Sapindales.
- Option C: Incorrect because it starts with Angiospermae, which is the highest rank, not the lowest.
- Option D: Incorrect as it also places Angiospermae first and disrupts the hierarchy.
Conclusion
Understanding the correct order of these taxonomic categories is essential for biological classification, providing a clear framework to identify and study organisms like the mango.
Taxonomy is the science of classification of organisms, and it organizes them into hierarchical categories. The correct sequence for the mango (Mangifera indica) in ascending order is crucial for understanding its scientific classification.
Correct Sequence Explained
The correct answer is option 'B':
Mangifera → Anacardiaceae → Sapindales → Dicotyledonae → Angiospermae
Breakdown of Taxonomic Categories
- Mangifera:
- The genus of the mango, which includes various species of mangoes.
- Anacardiaceae:
- The family that Mangifera belongs to. This family includes other plants like cashews and poison ivy.
- Sapindales:
- The order that encompasses several families, including Anacardiaceae. It is a broader classification that groups related families together.
- Dicotyledonae:
- A class of flowering plants (angiosperms) that typically have two embryonic leaves or cotyledons.
- Angiospermae:
- The highest taxonomic category in this sequence, representing all flowering plants. This is the largest group of plants in terms of diversity.
Why Other Options are Incorrect
- Option A: Incorrect as it places Dicotyledonae before Sapindales.
- Option C: Incorrect because it starts with Angiospermae, which is the highest rank, not the lowest.
- Option D: Incorrect as it also places Angiospermae first and disrupts the hierarchy.
Conclusion
Understanding the correct order of these taxonomic categories is essential for biological classification, providing a clear framework to identify and study organisms like the mango.
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