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All questions of Organisms and Population for NEET Exam
Biological organisation starts witha) Cellular levelb) Atomic levelc) Submicroscopic molecular leveld) Organismic levelCorrect answer is option 'C'. Can you explain this answer?
|
Rohit Shah answered |
Correct option is (c)
Biological organisation starts with submicroscopic molecular level, where four types of molecules, i.e. carbohydrates, lipids, proteins and nucleic acid are organised into organelles of cell.
Biological organisation starts with submicroscopic molecular level, where four types of molecules, i.e. carbohydrates, lipids, proteins and nucleic acid are organised into organelles of cell.
Animals undergo an inactive stage during the winter known as- a)Adaptation
- b)Hibernation
- c)Aestivation
- d)Acclimatisation
Correct answer is option 'B'. Can you explain this answer?
Animals undergo an inactive stage during the winter known as
a)
Adaptation
b)
Hibernation
c)
Aestivation
d)
Acclimatisation
|
Vijay Bansal answered |
Aestivation: Aestivation is summer sleep and during aestivation, animals usually tend to rest in a shady and cool place. ... In aestivation, usually cold blooded animals like reptiles maintain their body temperature by reducing their metabolic activities and protecting themselves from very high temperature.
Organisms capable of maintaining constant body temperature are- a)Poikilothermal
- b)Conformers
- c)Stenothermal
- d)Homeothermal
Correct answer is option 'D'. Can you explain this answer?
Organisms capable of maintaining constant body temperature are
a)
Poikilothermal
b)
Conformers
c)
Stenothermal
d)
Homeothermal
|
Pooja Mehta answered |
Homeotherms: animals who maintain a constant internal body temperature across a wide range of environmental conditions. Most mammals and birds are homeotherms.
Which of the following is/are poikilotherm:?- a)Tapeworm and rabbits
- b)Elephants
- c)Humans and fishes
- d)Tapeworm and naked mole rat
Correct answer is option 'D'. Can you explain this answer?
Which of the following is/are poikilotherm:?
a)
Tapeworm and rabbits
b)
Elephants
c)
Humans and fishes
d)
Tapeworm and naked mole rat
|
Divey Sethi answered |
In the given scenario, the laboratory population of fruit flies consists of 40 fruit flies, and during a specified time interval, 4 individuals died. To calculate the death rate, we divide the number of deaths by the total population.
Number of deaths = 4
Total population = 40
Total population = 40
Death rate = Number of deaths / Total population
= 4 / 40
= 0.1 individuals per fruitfly per week
= 4 / 40
= 0.1 individuals per fruitfly per week
Option a) "0.1 individuals per fruitfly per week" is the correct answer because it accurately represents the death rate calculated based on the given information.
Xerophytes are mostly- a)Succulents
- b)Water related
- c)Mesophytes
- d)None of the above
Correct answer is option 'A'. Can you explain this answer?
Xerophytes are mostly
a)
Succulents
b)
Water related
c)
Mesophytes
d)
None of the above
|
|
Pooja Mehta answered |
Plants adapted to living in dry environments such as succulents are termed xerophytes. However, not all xerophytes are succulents, since there are other ways of adapting to a shortage of water, e.g., by developing small leaves which may roll up or having leathery rather than succulent leaves.
Cold-blooded animals fall under the category of- a)Psychotherms
- b)Ectotherms
- c)Thermophiles
- d)Endotherms
Correct answer is option 'B'. Can you explain this answer?
Cold-blooded animals fall under the category of
a)
Psychotherms
b)
Ectotherms
c)
Thermophiles
d)
Endotherms
|
|
Priya Patel answered |
An ectotherm "outside" and "hot"), is an organism in which internal physiological sources of heat are of relatively small or quite negligible importance in controlling body temperature.] Such organisms (for example frogs) rely on environmental heat sources,which permit them to operate at very economical metabolic rates. Colloquially, some refer to these organisms as "cold blooded" though such a term is not technically correct, as the blood temperature of the organism varies with ambient environmental temperature. Some of these animals live in environments where temperatures are practically constant, as is typical of regions of the abyssal ocean and hence can be regarded as homeothermic ectotherms. In contrast, in places where temperature varies so widely as to limit the physiological activities of other kinds of ectotherms, many species habitually seek out external sources of heat or shelter from heat; for example, many reptiles regulate their body temperature by basking in the sun, or seeking shade when necessary in addition to a whole host of other behavioral thermoregulation mechanisms. For home captivity as pet, reptile owners can use a UVB/UVA light system to assist the animals' basking behaviour.
The birth and death rates of four counteries are given below. which one will have the least population growth rate?
- a)P
- b)Q
- c)R
- d)S
Correct answer is option 'D'. Can you explain this answer?
The birth and death rates of four counteries are given below. which one will have the least population growth rate?
a)
P
b)
Q
c)
R
d)
S
|
Top Rankers answered |
Growth rate = Birth rate - death rate
For country P, it is 10/1000. For country Q, It is 15/1000
For country R, it is 17/1000. For country S, It is 7/1000
Hence, country S has the least population growth rate
For country P, it is 10/1000. For country Q, It is 15/1000
For country R, it is 17/1000. For country S, It is 7/1000
Hence, country S has the least population growth rate
A statement 933 females per 1000 males depict:- a)ecological ages
- b)generation time
- c)sex ratio
- d)biotic potential
Correct answer is option 'C'. Can you explain this answer?
A statement 933 females per 1000 males depict:
a)
ecological ages
b)
generation time
c)
sex ratio
d)
biotic potential
|
Aman Sharma answered |
Sex ratio is the no of female available per thousands of male in a population. Sex ratio is decline due to female feticides alarmingly in some part of India.
Orchid shows commensalism as interaction with:- a)bee
- b)mango tree
- c)both mango tree and bee
- d)none of these
Correct answer is option 'B'. Can you explain this answer?
Orchid shows commensalism as interaction with:
a)
bee
b)
mango tree
c)
both mango tree and bee
d)
none of these
|
Shivani Rane answered |
Commensalism is interaction in which one species is benefited by other is neither benefited nor harmed. Orchids growing on mango tree do not harm the mango plants but get shelter.
Small fish get stuck near the bottom of a shark and derive their nutrition from it? This kind of association is called- a)Parasitism
- b)Symbiosis
- c)Predation
- d)Commensalism
Correct answer is option 'D'. Can you explain this answer?
Small fish get stuck near the bottom of a shark and derive their nutrition from it? This kind of association is called
a)
Parasitism
b)
Symbiosis
c)
Predation
d)
Commensalism
|
Sonal Chakraborty answered |
Commensalism is a type of symbiotic relationship where one species benefits from the association, while the other is neither harmed nor helped. In this type of association, one species derives benefits from the other without causing any harm to the host.
Explanation:
In the given scenario, the small fish gets stuck near the bottom of a shark and derives its nutrition from it. The small fish is not harming the shark, nor is it providing any benefits to the shark. Therefore, this is an example of commensalism.
The small fish is using the shark as a shelter and also gets access to food particles that are present near the shark's mouth. The shark is not affected by the presence of the small fish, and it does not derive any benefit from it either.
In summary, commensalism is a type of symbiotic relationship where one species benefits from the association, while the other is neither harmed nor helped. The small fish getting stuck near the bottom of a shark and deriving its nutrition from it is an example of commensalism.
Explanation:
In the given scenario, the small fish gets stuck near the bottom of a shark and derives its nutrition from it. The small fish is not harming the shark, nor is it providing any benefits to the shark. Therefore, this is an example of commensalism.
The small fish is using the shark as a shelter and also gets access to food particles that are present near the shark's mouth. The shark is not affected by the presence of the small fish, and it does not derive any benefit from it either.
In summary, commensalism is a type of symbiotic relationship where one species benefits from the association, while the other is neither harmed nor helped. The small fish getting stuck near the bottom of a shark and deriving its nutrition from it is an example of commensalism.
The birth rate if 7 new plants are added to previous year plant population of 23 Salvinia plants will be:- a)0.3
- b)0.25
- c)0.4
- d)0.5
Correct answer is option 'A'. Can you explain this answer?
The birth rate if 7 new plants are added to previous year plant population of 23 Salvinia plants will be:
a)
0.3
b)
0.25
c)
0.4
d)
0.5
|
Rohan Unni answered |
The birth rate of a population = new individual added / previous population. Here birth rate= 7/23=0.3043. Hence, birth rate of Salvinia plants is equal to 0.3.
A large regional unit characterised by a major vegetation type and associated fauna found in a specific climate zone constitutes- a)Biological community
- b)Ecosystem
- c)Biome
- d)Habitat
Correct answer is option 'C'. Can you explain this answer?
A large regional unit characterised by a major vegetation type and associated fauna found in a specific climate zone constitutes
a)
Biological community
b)
Ecosystem
c)
Biome
d)
Habitat
|
Gaurav Kumar answered |
A biome is a community of plants and animals that have common characteristics for the environment they exist in. They can be found over a range of continents. Biomes are distinct biological communities that have formed in response to a shared physical climate."Biome" is a broader term than "habitat"; any biome can comprise a variety of habitats.
While a biome can cover large areas, a microbiome is a mix of organisms that coexist in a defined space on a much smaller scale. For example, the human microbiome is the collection of bacteria, viruses, and other microorganisms that are present on or in a human body.
A 'biota' is the total collection of organisms of a geographic region or a time period, from local geographic scales and instantaneous temporal scales all the way up to whole-planet and whole-timescale spatiotemporal scales. The biotas of the Earth make up the biosphere.
Interacting members of species live close to each other in following interaction/s:- a)parasitism
- b)competition
- c)commensalism, predation and parasitism
- d)commensalism
Correct answer is option 'C'. Can you explain this answer?
Interacting members of species live close to each other in following interaction/s:
a)
parasitism
b)
competition
c)
commensalism, predation and parasitism
d)
commensalism
|
Sushant Goyal answered |
Interacting members of species live close to each other in commensalism, predation and parasitism.
Mycorrhiza represents - a)symbiotic association between a fungus and liverworts
- b)parasitic association between a fungus and an alga
- c)parasitic association between a fungus and roots of plants
- d)symbiotic association between a fungus and roots of higher plants
Correct answer is option 'D'. Can you explain this answer?
Mycorrhiza represents
a)
symbiotic association between a fungus and liverworts
b)
parasitic association between a fungus and an alga
c)
parasitic association between a fungus and roots of plants
d)
symbiotic association between a fungus and roots of higher plants
|
Sonal Kulkarni answered |
A nutrient depletion zone can develop when there is rapid soil solution uptake, low nutrient concentration, low diffusion rate, or low soil moisture. These conditions are very common; therefore, most plants rely on fungi to facilitate the uptake of minerals from the soil. Mycorrhizae, known as root fungi, form symbiotic associations with plant roots. In these associations, the fungi are actually integrated into the physical structure of the root. The fungi colonize the living root tissue during active plant growth.
Human population follows the- a)J-shaped growth curve
- b)Z-shaped growth curve
- c)S-shaped growth curve
- d)All of the above
Correct answer is option 'C'. Can you explain this answer?
Human population follows the
a)
J-shaped growth curve
b)
Z-shaped growth curve
c)
S-shaped growth curve
d)
All of the above
|
Harshitha Chavan answered |
Logarithmic or Exponential phase : It is characterized by rapid growth in population which continues till enough food is available. But with the increase in reindeer population, there is corresponding decrease in the availability of food and space, which finally become exhausted, which leads to mass starvation and mortality. This sudden increase in mortality is called population crash. Lemming of Tundra, some insect, algal blooms and annual plants also show J-shaped curves. The population growth curve is S- shaped in most of the organisms, Human population also shows S-shaped curve.
In a pond, last year there were 30 lotus plants. Through reproduction, 25 new lotus plants were added in one year while 8 plants died. The birth and death rates for the lotus population respectively are ___ and ____ individuals per lotus per year.- a)0.83 , 0.26
- b)0.26, 0.83
- c)0.25 , 0.80
- d)0.80, 0.25
Correct answer is option 'A'. Can you explain this answer?
In a pond, last year there were 30 lotus plants. Through reproduction, 25 new lotus plants were added in one year while 8 plants died. The birth and death rates for the lotus population respectively are ___ and ____ individuals per lotus per year.
a)
0.83 , 0.26
b)
0.26, 0.83
c)
0.25 , 0.80
d)
0.80, 0.25
|
Abha Dhamija answered |
Total number of plants (in the beginning ) = 30
New plants added by reproduction = 25
Birth rate (of a population)
New plants added by reproduction = 25
Birth rate (of a population)
=0.83 individuals per lotus per year
Number of plants died =8
Exponential growth pattern in a population results into:- a)Sigmoid curve
- b)U-shaped curve
- c)J-shaped curve
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Exponential growth pattern in a population results into:
a)
Sigmoid curve
b)
U-shaped curve
c)
J-shaped curve
d)
None of these
|
Shalini Saha answered |
Exponential growth pattern in population results into j-shaped curve. During exponential growth faster growth occurs and j-shaped curve is formed when time v/s growth is drawn.
The formula for exponential population growth is- a)dN/rN = dt
- b)r N/dN = dt
- c)dt/dN = r N
- d)dN/dt = r N
Correct answer is option 'D'. Can you explain this answer?
The formula for exponential population growth is
a)
dN/rN = dt
b)
r N/dN = dt
c)
dt/dN = r N
d)
dN/dt = r N
|
Abhiram Nair answered |
Ans.
Formula = the rate of change in population size) = (the contribution of each individual to population growth) x (the number of individuals in the population
In which of the following interaction/s one species is benefitted while other is harmed?- a)parasitism only
- b)competition only
- c)predation and parasitism
- d)competition and amensalism
Correct answer is option 'C'. Can you explain this answer?
In which of the following interaction/s one species is benefitted while other is harmed?
a)
parasitism only
b)
competition only
c)
predation and parasitism
d)
competition and amensalism
|
Nayanika Dasgupta answered |
In predation and parasitism one species is benefitted while other is harmed. Parasite obtain food from host by harming them.
In a population per capita birth rate is 0.15 and per capita death rate is 0.08 during a unit time period. What is the value of r (intrinsic rate of natural increase) for the given population ?- a)0.023
- b)0.07
- c)0.05
- d)0.25
Correct answer is option 'B'. Can you explain this answer?
In a population per capita birth rate is 0.15 and per capita death rate is 0.08 during a unit time period. What is the value of r (intrinsic rate of natural increase) for the given population ?
a)
0.023
b)
0.07
c)
0.05
d)
0.25
|
EduRev NEET answered |
Intrinsic rate of natural increase (r)
= Birth rate − death rate
=0.15−0.08=0.07
For which of the following would you expect distribution range to be badly affected if average Global temperature keeps increasing:- a)Stenothermal species
- b)Euryhaline species
- c)Both Stenothermal species and Euryhaline species
- d)Eurythermal species
Correct answer is option 'A'. Can you explain this answer?
For which of the following would you expect distribution range to be badly affected if average Global temperature keeps increasing:
a)
Stenothermal species
b)
Euryhaline species
c)
Both Stenothermal species and Euryhaline species
d)
Eurythermal species
|
Diya Datta answered |
A majority of organisms are restricted to narrow range of temperature. Such organisms are called stenothermal species. The distribution range of these species will be adversely affected if average global temperature keeps increasing.
Ecology is the study of the relationships between living organisms and:- a)Abiotic and biotic components
- b)Biotic components only
- c)Abiotic components only
- d)Non-living components only
Correct answer is option 'A'. Can you explain this answer?
Ecology is the study of the relationships between living organisms and:
a)
Abiotic and biotic components
b)
Biotic components only
c)
Abiotic components only
d)
Non-living components only
|
Milan Unni answered |
Ecology is the branch of biology that studies the relationships between living organisms and their environment. It is concerned with understanding how organisms interact with both the biotic (living) and abiotic (non-living) components of their surroundings.
An example of predation is :- a)Cuckoo laying eggs in crow’s nest
- b)Biological control of pest population
- c)Penicilliumwhose toxins kill bacteria
- d)None of the these
Correct answer is option 'B'. Can you explain this answer?
An example of predation is :
a)
Cuckoo laying eggs in crow’s nest
b)
Biological control of pest population
c)
Penicilliumwhose toxins kill bacteria
d)
None of the these
|
Abhishek Choudhary answered |
Biological control method adopted in agricultural pest control are based on the ability of predator to regulate prey population.
“In Competition, the superior competitor eliminates the inferior one”, this statement is called?- a)Gause’s principle
- b)Allen’s rule
- c)Darwinian fitness
- d)All of these
Correct answer is option 'A'. Can you explain this answer?
“In Competition, the superior competitor eliminates the inferior one”, this statement is called?
a)
Gause’s principle
b)
Allen’s rule
c)
Darwinian fitness
d)
All of these
|
Rajesh Datta answered |
E In competition, superior competitor eliminates the inferior one. This statement is called Gause’s competitive exclusion principle. Two closely related competing for same resources cannot co-exist indefinitely and inferior will be eliminated.
Species facing competition might evolve mechanism that promotes co-existence rather than exclusion and that mechanism can be- a)Interspecific competition
- b)Intraspecific competition
- c)Competitive release
- d)Resource partitioning
Correct answer is option 'D'. Can you explain this answer?
Species facing competition might evolve mechanism that promotes co-existence rather than exclusion and that mechanism can be
a)
Interspecific competition
b)
Intraspecific competition
c)
Competitive release
d)
Resource partitioning
|
Pooja Choudhary answered |
Species facing completion might evolve mechanism that promotes co-existence rather than exclusion that mechanism is called resource partitioning. In which they avoid completion by choosing different times of feeding or different foraging patterns.
Which of the following adaptations are examples of plant defenses against herbivores?- a)Thorns on Acacia trees.
- b)High reproductive rate of a parasitic plant.
- c)Chemical production in Calotropis that harms herbivores.
- d)Camouflage in insects like the Monarch butterfly.
Correct answer is option 'A'. Can you explain this answer?
a)
Thorns on Acacia trees.
b)
High reproductive rate of a parasitic plant.
c)
Chemical production in Calotropis that harms herbivores.
d)
Camouflage in insects like the Monarch butterfly.
|
Infinity Academy answered |
Thorns on Acacia trees (A) and chemical production in Calotropis (C) are direct plant defenses against herbivores. The other options do not describe plant adaptations.
Topic in NCERT: Defenses Against Herbivory
Line in NCERT: "Plants therefore have evolved an astonishing variety of morphological and chemical defences against herbivores. Thorns (Acacia, Cactus) are the most common morphological means of defence. Many plants produce and store chemicals that make the herbivore sick when they are eaten, inhibit feeding or digestion, disrupt its reproduction or even kill it."
Statement I: Age pyramid of expanding population is broader at base and thin upwards.
Statement II: Number of individuals in pre-reproductive age is more than post reproductive age.
Statement III: population size is technically called as population density.- a)Only statement II and III are correct.
- b)Only statement I and II are correct.
- c)All statements are correct.
- d)All statements are incorrect.
Correct answer is option 'C'. Can you explain this answer?
Statement I: Age pyramid of expanding population is broader at base and thin upwards.
Statement II: Number of individuals in pre-reproductive age is more than post reproductive age.
Statement III: population size is technically called as population density.
Statement II: Number of individuals in pre-reproductive age is more than post reproductive age.
Statement III: population size is technically called as population density.
a)
Only statement II and III are correct.
b)
Only statement I and II are correct.
c)
All statements are correct.
d)
All statements are incorrect.
|
Prashanth Dasgupta answered |
Age pyramid of expanding population is broader at base and thin upwards. Number of individuals in pre-reproductive age is more than post reproductive age. Population size is technically called as population density.
Mediterranean orchid Ophrysensures pollination by :- a)Pseudocopulation only
- b)Sexual deceit and co-evolution
- c)Brood parasitism
- d)Co-evolution, sexual deceit and pseudo-copulation
Correct answer is option 'D'. Can you explain this answer?
Mediterranean orchid Ophrysensures pollination by :
a)
Pseudocopulation only
b)
Sexual deceit and co-evolution
c)
Brood parasitism
d)
Co-evolution, sexual deceit and pseudo-copulation
|
Yash Saha answered |
Mediterranean orchid Ophrys ensures pollination by co-evolution, sexual deceit and pseudo-copulation. One petal of flower bears an uncanny resemblance to female of bee in size, colour and markings.
What does the carrying capacity (K) of a habitat refer to?- a)The maximum growth rate a population can achieve
- b)The maximum number of individuals an environment can support
- c)The rate of immigration into a population
- d)The total biomass of a population
Correct answer is option 'B'. Can you explain this answer?
a)
The maximum growth rate a population can achieve
b)
The maximum number of individuals an environment can support
c)
The rate of immigration into a population
d)
The total biomass of a population
|
Ambition Institute answered |
Carrying capacity (K) refers to the maximum number of individuals a habitat can support given the available resources. Beyond this limit, the population will stop growing or may even decline due to resource depletion.
Topic in NCERT: Carrying Capacity
Line in NCERT: "In nature, a given habitat has enough resources to support a maximum possible number, beyond which no further growth is possible. Let us call this limit as nature's carrying capacity (K) for that species in that habitat."
An age pyramid with a wide base and narrow top indicates a population that is:- a)Changing
- b)Stable
- c)Declining
- d)Growing rapidly
Correct answer is option 'D'. Can you explain this answer?
An age pyramid with a wide base and narrow top indicates a population that is:
a)
Changing
b)
Stable
c)
Declining
d)
Growing rapidly
|
Akshay Chavan answered |
Age Pyramid
An age pyramid, also known as an age distribution graph or population pyramid, is a graphical representation of the age and sex distribution of a population. The pyramid is divided into male and female populations, with age cohorts represented on the horizontal axis and the percentage of the population represented on the vertical axis.
Interpreting an Age Pyramid
The shape of an age pyramid provides valuable insights into the demographic characteristics of a population. By examining the width of the base and the narrowness of the top, we can determine the growth rate and age structure of the population.
Wide Base
A wide base on an age pyramid indicates a large proportion of young individuals in the population. This suggests a high birth rate and a growing population. The wider the base, the higher the number of children and young adults, indicating a significant proportion of the population is in the reproductive age group.
Narrow Top
A narrow top on an age pyramid indicates a smaller proportion of elderly individuals in the population. This suggests a lower life expectancy and a lower proportion of older adults. A narrow top indicates a lower percentage of the population in the older age groups.
Explanation of the Correct Answer
The correct answer, option 'D' (Growing rapidly), is inferred from the description of an age pyramid with a wide base and narrow top. This pyramid shape indicates a population that has a high birth rate and a large proportion of young individuals. The narrower top suggests a lower life expectancy and a smaller proportion of older individuals.
When a population has a wide base and a narrow top, it indicates that the birth rate is higher than the death rate, leading to a rapid increase in population size. The large number of young individuals suggests a growing population with a high potential for future growth.
Therefore, an age pyramid with a wide base and narrow top indicates a population that is growing rapidly.
An age pyramid, also known as an age distribution graph or population pyramid, is a graphical representation of the age and sex distribution of a population. The pyramid is divided into male and female populations, with age cohorts represented on the horizontal axis and the percentage of the population represented on the vertical axis.
Interpreting an Age Pyramid
The shape of an age pyramid provides valuable insights into the demographic characteristics of a population. By examining the width of the base and the narrowness of the top, we can determine the growth rate and age structure of the population.
Wide Base
A wide base on an age pyramid indicates a large proportion of young individuals in the population. This suggests a high birth rate and a growing population. The wider the base, the higher the number of children and young adults, indicating a significant proportion of the population is in the reproductive age group.
Narrow Top
A narrow top on an age pyramid indicates a smaller proportion of elderly individuals in the population. This suggests a lower life expectancy and a lower proportion of older adults. A narrow top indicates a lower percentage of the population in the older age groups.
Explanation of the Correct Answer
The correct answer, option 'D' (Growing rapidly), is inferred from the description of an age pyramid with a wide base and narrow top. This pyramid shape indicates a population that has a high birth rate and a large proportion of young individuals. The narrower top suggests a lower life expectancy and a smaller proportion of older individuals.
When a population has a wide base and a narrow top, it indicates that the birth rate is higher than the death rate, leading to a rapid increase in population size. The large number of young individuals suggests a growing population with a high potential for future growth.
Therefore, an age pyramid with a wide base and narrow top indicates a population that is growing rapidly.
Which growth pattern occurs when resources become progressively limiting in a population?- a)Logistic growth
- b)Exponential growth
- c)Constant growth
- d)Declining growth
Correct answer is option 'A'. Can you explain this answer?
Which growth pattern occurs when resources become progressively limiting in a population?
a)
Logistic growth
b)
Exponential growth
c)
Constant growth
d)
Declining growth
|
|
Tarun Saha answered |
Logistic growth
Logistic growth is a growth pattern that occurs when resources become progressively limiting in a population. It is a more realistic model of population growth compared to exponential growth, which does not take into account the carrying capacity of an environment.
Understanding logistic growth
Logistic growth is characterized by an initial exponential increase in population size, followed by a slowing down of growth as resources become limited. This is because as a population grows, it will eventually reach a point where there are not enough resources (such as food, water, and shelter) to support further growth.
Factors affecting logistic growth
Several factors influence the occurrence of logistic growth in a population:
1. Carrying capacity: The carrying capacity is the maximum number of individuals that an environment can sustainably support. As a population reaches this limit, resources become increasingly scarce, causing growth to slow down.
2. Density-dependent factors: These are factors that have a greater impact on population growth as population density increases. Examples include competition for resources, predation, and disease. As population density increases due to exponential growth, these factors become more significant in limiting growth.
3. Birth and death rates: In a logistic growth model, birth rates initially exceed death rates, leading to exponential growth. However, as resources become limiting, birth rates start to decline, and death rates may increase due to increased competition and reduced access to resources.
Graphical representation
Logistic growth is often represented graphically using an S-shaped curve. In the initial phase, the curve rises steeply, representing exponential growth. As the population approaches the carrying capacity, the curve levels off and reaches a plateau, indicating the slowing down of growth. At the carrying capacity, the population stabilizes and remains relatively constant.
Significance of logistic growth
Understanding logistic growth is crucial in ecology and population biology. It helps us predict and manage populations, determine the impacts of resource availability on population dynamics, and assess the sustainability of ecosystems. By considering the carrying capacity and the factors that influence population growth, we can make more accurate predictions and develop effective conservation and management strategies.
Logistic growth is a growth pattern that occurs when resources become progressively limiting in a population. It is a more realistic model of population growth compared to exponential growth, which does not take into account the carrying capacity of an environment.
Understanding logistic growth
Logistic growth is characterized by an initial exponential increase in population size, followed by a slowing down of growth as resources become limited. This is because as a population grows, it will eventually reach a point where there are not enough resources (such as food, water, and shelter) to support further growth.
Factors affecting logistic growth
Several factors influence the occurrence of logistic growth in a population:
1. Carrying capacity: The carrying capacity is the maximum number of individuals that an environment can sustainably support. As a population reaches this limit, resources become increasingly scarce, causing growth to slow down.
2. Density-dependent factors: These are factors that have a greater impact on population growth as population density increases. Examples include competition for resources, predation, and disease. As population density increases due to exponential growth, these factors become more significant in limiting growth.
3. Birth and death rates: In a logistic growth model, birth rates initially exceed death rates, leading to exponential growth. However, as resources become limiting, birth rates start to decline, and death rates may increase due to increased competition and reduced access to resources.
Graphical representation
Logistic growth is often represented graphically using an S-shaped curve. In the initial phase, the curve rises steeply, representing exponential growth. As the population approaches the carrying capacity, the curve levels off and reaches a plateau, indicating the slowing down of growth. At the carrying capacity, the population stabilizes and remains relatively constant.
Significance of logistic growth
Understanding logistic growth is crucial in ecology and population biology. It helps us predict and manage populations, determine the impacts of resource availability on population dynamics, and assess the sustainability of ecosystems. By considering the carrying capacity and the factors that influence population growth, we can make more accurate predictions and develop effective conservation and management strategies.
If N population density at time t, then population density at time t+1 can be written asNt +1=Nt +[(A+B)−(C+D)]
Select the correct option for A, B, C and D in the above equation. - a)A can be mortality and B can be natality
- b)B can be immigration and C can be natality
- c)C can be mortality and D can be immigration
- d)A can be natality and D can be emigration
Correct answer is option 'D'. Can you explain this answer?
If N population density at time t, then population density at time t+1 can be written as
Nt +1=Nt +[(A+B)−(C+D)]
Select the correct option for A, B, C and D in the above equation.
Select the correct option for A, B, C and D in the above equation.
a)
A can be mortality and B can be natality
b)
B can be immigration and C can be natality
c)
C can be mortality and D can be immigration
d)
A can be natality and D can be emigration
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Jyoti Sengupta answered |
A and B are natality and immigration. They add to population density. C and D are mortality and emigration. They decrease population density.
Which of the following is not a factor that would limit the growth of a population ?- a)Food shortage
- b)Immigration
- c)Disease
- d)Famine
Correct answer is option 'B'. Can you explain this answer?
Which of the following is not a factor that would limit the growth of a population ?
a)
Food shortage
b)
Immigration
c)
Disease
d)
Famine
|
Dev Patel answered |
Immigration is the permanent inward movement of some individuals coming from outside into an existing population. This increase population density and would not limit its growth.
_____ biomes are abundant in regions of hot and wet climate, while _____ biomes are found in hot and dry climate.- a)Desert, temperate
- b)Tropical, desert
- c)Tundra, savannah
- d)Desert, chapparal
Correct answer is option 'B'. Can you explain this answer?
_____ biomes are abundant in regions of hot and wet climate, while _____ biomes are found in hot and dry climate.
a)
Desert, temperate
b)
Tropical, desert
c)
Tundra, savannah
d)
Desert, chapparal
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Jyoti Sengupta answered |
In tropical biome, the climate is warm with alternate wet dry periods. Rainfall is 90-160 cm. The climate in desert biome is hot and dry. The air, having little water vapour, is a poor insulator. The temperature rises considerably during the day and falls greatly at night because the ground radiates heat rapidly.
It can be said that some animals in their evolutionary development preferred to be conformers than regulators. Which of the following can be the best suited reason for it?- a)The metabolic reactions of these organisms can occur at a very wide range of temperature
- b)Maintaining homeostasis is an energetically expensive process
- c)The enzymes of these organisms are functional at high temperatures
- d)Both (b) and (c)
Correct answer is option 'B'. Can you explain this answer?
It can be said that some animals in their evolutionary development preferred to be conformers than regulators. Which of the following can be the best suited reason for it?
a)
The metabolic reactions of these organisms can occur at a very wide range of temperature
b)
Maintaining homeostasis is an energetically expensive process
c)
The enzymes of these organisms are functional at high temperatures
d)
Both (b) and (c)
|
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Jyoti Sengupta answered |
Maintainig homeostasis, especially thermoregulation is energetically expensive for many organisms. During the course of evolution, the costs and benefits of maintaining a constant internal environment were taken into consideration and thus some species preferred to be conformers.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion (A) : Ecology is concerned with four levels of biological organisation.Reason (R) : Organisms, populations, communities and biomes are four levels of biological organisation.- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
Correct answer is option 'A'. Can you explain this answer?
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Ecology is concerned with four levels of biological organisation.
Reason (R) : Organisms, populations, communities and biomes are four levels of biological organisation.
a)
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
b)
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
c)
Assertion (A) is true but reason (R) is false.
d)
Assertion (A) is false but reason (R) is true.
|
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Dev Patel answered |
Ecology includes six levels of organization that are organism, population, community, ecosystem, biosphere and biome.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :Assertion (A) : Population has certain attributes which an individual organism does not have.Reason (R) : Population is a group of people living in a well defined area, at a particular time.- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
Correct answer is option 'B'. Can you explain this answer?
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Population has certain attributes which an individual organism does not have.
Reason (R) : Population is a group of people living in a well defined area, at a particular time.
a)
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
b)
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
c)
Assertion (A) is true but reason (R) is false.
d)
Assertion (A) is false but reason (R) is true.
|
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Dev Patel answered |
Population is a group of people therefore it's attributes are different from an individual organism.
Read the following text and answer the following question on the basis of the same:Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.Q. The equations correctly represents Verhulst-Pearl logistic growth is:- a)dN/dt = rN(K-N)/K
- b)dN/dt = rN/K
- c)dN/dt = N(K-N)/K
- d)dN/dt = r(K-N)/K
Correct answer is option 'A'. Can you explain this answer?
Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. The equations correctly represents Verhulst-Pearl logistic growth is:
a)
dN/dt = rN(K-N)/K
b)
dN/dt = rN/K
c)
dN/dt = N(K-N)/K
d)
dN/dt = r(K-N)/K
|
|
Akash Saini answered |
Understanding Logistic Growth
Logistic growth is a model that describes how a population grows in an environment with limited resources. The Verhulst-Pearl logistic growth equation is essential in understanding this concept.
Key Features of Logistic Growth:
- Initial Slow Growth: The population starts with a slow increase due to limited resources available for growth.
- Acceleration Phase: As resources become more available, the growth rate accelerates.
- Deceleration Phase: Eventually, the population growth slows down as it approaches the carrying capacity of the environment.
Equation Explanation:
The correct equation representing Verhulst-Pearl logistic growth is:
- dN/dt = rN(K-N)/K
Here’s a breakdown of the components:
- dN/dt: Rate of change of the population size over time.
- r: The intrinsic growth rate of the population.
- N: Current population size.
- K: Carrying capacity of the environment.
- (K-N): Represents the remaining resources available for growth; as N approaches K, (K-N) decreases, slowing down the growth rate.
Why Option A is Correct:
- Option A accurately incorporates both the intrinsic growth rate (r) and the effect of limited resources on the population growth, making it a comprehensive representation of logistic growth.
- Other options either misrepresent the relationship between population size and carrying capacity or fail to include the intrinsic growth rate effectively.
Conclusion:
Understanding the logistic growth model is crucial for predicting population dynamics in ecology, particularly in contexts where resources are limited. The Verhulst-Pearl equation provides a robust framework for these predictions.
Logistic growth is a model that describes how a population grows in an environment with limited resources. The Verhulst-Pearl logistic growth equation is essential in understanding this concept.
Key Features of Logistic Growth:
- Initial Slow Growth: The population starts with a slow increase due to limited resources available for growth.
- Acceleration Phase: As resources become more available, the growth rate accelerates.
- Deceleration Phase: Eventually, the population growth slows down as it approaches the carrying capacity of the environment.
Equation Explanation:
The correct equation representing Verhulst-Pearl logistic growth is:
- dN/dt = rN(K-N)/K
Here’s a breakdown of the components:
- dN/dt: Rate of change of the population size over time.
- r: The intrinsic growth rate of the population.
- N: Current population size.
- K: Carrying capacity of the environment.
- (K-N): Represents the remaining resources available for growth; as N approaches K, (K-N) decreases, slowing down the growth rate.
Why Option A is Correct:
- Option A accurately incorporates both the intrinsic growth rate (r) and the effect of limited resources on the population growth, making it a comprehensive representation of logistic growth.
- Other options either misrepresent the relationship between population size and carrying capacity or fail to include the intrinsic growth rate effectively.
Conclusion:
Understanding the logistic growth model is crucial for predicting population dynamics in ecology, particularly in contexts where resources are limited. The Verhulst-Pearl equation provides a robust framework for these predictions.
Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. Identify the correct equation that represents the exponential population growth curve:
- a)dN/dt = IN
- b)Both (A) and (C)
- c)Nt =N0ert
- d)dN/dt = rN
Correct answer is option 'D'. Can you explain this answer?
Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. Identify the correct equation that represents the exponential population growth curve:
a)
dN/dt = IN
b)
Both (A) and (C)
c)
Nt =N0ert
d)
dN/dt = rN
|
|
Dev Patel answered |
At the constant birth rate in population through time and is never limited by food or disease, known as exponential growth.
The formula of exponential growth is dN/dt=rN where dN/dt is the rate of change in population size, r is the biotic potential and N is the population size.
The formula of exponential growth is dN/dt=rN where dN/dt is the rate of change in population size, r is the biotic potential and N is the population size.
Read the following text and answer the following question on the basis of the same:Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.Q. Identify the incorrect statement:- a)Exponential growth occurs in organisms such as lemmings.
- b)Logistic growth is more realistic.
- c)Exponential growth has two phases: lag and log.
- d)In logistic growth, population passes well beyond the carrying capacity of the ecosystem.
Correct answer is option 'D'. Can you explain this answer?
Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. Identify the incorrect statement:
a)
Exponential growth occurs in organisms such as lemmings.
b)
Logistic growth is more realistic.
c)
Exponential growth has two phases: lag and log.
d)
In logistic growth, population passes well beyond the carrying capacity of the ecosystem.
|
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Dev Patel answered |
In logistic growth the population seldom grows beyond the carrying capacity of the ecosystem.
Consider the following statements about population growth and dynamics:
1. Exponential growth occurs only when resources are limited.
2. Logistic growth models show a sigmoid curve and account for carrying capacity.
3. Natality, mortality, immigration, and emigration are the four main factors that influence population size.
4. The intrinsic rate of natural increase (r) is constant and unaffected by environmental conditions.
Which of the following options is correct?- a)Statements 1 and 4 are correct.
- b)Statements 2 and 3 are correct.
- c)Statements 1 and 3 are correct.
- d)All statements are correct.
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements about population growth and dynamics:
1. Exponential growth occurs only when resources are limited.
2. Logistic growth models show a sigmoid curve and account for carrying capacity.
3. Natality, mortality, immigration, and emigration are the four main factors that influence population size.
4. The intrinsic rate of natural increase (r) is constant and unaffected by environmental conditions.
Which of the following options is correct?
1. Exponential growth occurs only when resources are limited.
2. Logistic growth models show a sigmoid curve and account for carrying capacity.
3. Natality, mortality, immigration, and emigration are the four main factors that influence population size.
4. The intrinsic rate of natural increase (r) is constant and unaffected by environmental conditions.
Which of the following options is correct?
a)
Statements 1 and 4 are correct.
b)
Statements 2 and 3 are correct.
c)
Statements 1 and 3 are correct.
d)
All statements are correct.
|
Jay Chaudhary answered |
Understanding Population Growth Dynamics
Population dynamics is a crucial field of study in ecology, focusing on how populations change over time. Let's evaluate the given statements:
1. Exponential Growth and Resource Limitations
- Incorrect Statement: Exponential growth occurs when resources are abundant, allowing populations to grow rapidly without constraints. It does not occur only when resources are limited.
2. Logistic Growth and Carrying Capacity
- Correct Statement: Logistic growth is characterized by a sigmoid curve, which illustrates how a population grows rapidly at first, then slows as it approaches the carrying capacity of the environment. This model effectively integrates the concept of environmental limitations.
3. Factors Influencing Population Size
- Correct Statement: Natality (birth rate), mortality (death rate), immigration (movement into a population), and emigration (movement out of a population) are indeed the primary factors that influence population size, making this statement accurate.
4. Intrinsic Rate of Natural Increase (r)
- Incorrect Statement: The intrinsic rate of natural increase (r) is not constant; it can vary based on environmental conditions, resource availability, and other ecological factors.
Conclusion
Based on the evaluation:
- Statements 2 and 3 are correct, while statements 1 and 4 are incorrect. Thus, the correct answer is option B: "Statements 2 and 3 are correct."
Understanding these principles is essential for grasping how populations grow and interact with their environments, which is a key aspect of ecological studies in NEET.
Population dynamics is a crucial field of study in ecology, focusing on how populations change over time. Let's evaluate the given statements:
1. Exponential Growth and Resource Limitations
- Incorrect Statement: Exponential growth occurs when resources are abundant, allowing populations to grow rapidly without constraints. It does not occur only when resources are limited.
2. Logistic Growth and Carrying Capacity
- Correct Statement: Logistic growth is characterized by a sigmoid curve, which illustrates how a population grows rapidly at first, then slows as it approaches the carrying capacity of the environment. This model effectively integrates the concept of environmental limitations.
3. Factors Influencing Population Size
- Correct Statement: Natality (birth rate), mortality (death rate), immigration (movement into a population), and emigration (movement out of a population) are indeed the primary factors that influence population size, making this statement accurate.
4. Intrinsic Rate of Natural Increase (r)
- Incorrect Statement: The intrinsic rate of natural increase (r) is not constant; it can vary based on environmental conditions, resource availability, and other ecological factors.
Conclusion
Based on the evaluation:
- Statements 2 and 3 are correct, while statements 1 and 4 are incorrect. Thus, the correct answer is option B: "Statements 2 and 3 are correct."
Understanding these principles is essential for grasping how populations grow and interact with their environments, which is a key aspect of ecological studies in NEET.
Which of the following best explains why logistic growth occurs in populations?- a)Populations grow exponentially when resources are unlimited and then decrease rapidly due to the depletion of resources.
- b)Populations grow exponentially but reach a plateau when resources become limited, as determined by the environment's carrying capacity.
- c)Populations exhibit exponential growth indefinitely because they always have sufficient resources.
- d)Populations decline due to environmental factors without any increase in population size.
Correct answer is option 'B'. Can you explain this answer?
a)
Populations grow exponentially when resources are unlimited and then decrease rapidly due to the depletion of resources.
b)
Populations grow exponentially but reach a plateau when resources become limited, as determined by the environment's carrying capacity.
c)
Populations exhibit exponential growth indefinitely because they always have sufficient resources.
d)
Populations decline due to environmental factors without any increase in population size.
|
Lead Academy answered |
Logistic growth occurs when populations experience exponential growth under ideal conditions but eventually slow down and level off as resources become limited. The population size stabilizes around the environment's carrying capacity, where growth is regulated by factors like food availability, space, and other ecological constraints.
Which of the following are examples of parasitism?- a) interaction between sea anemone that has stinging tentacles and the clown fish
- b)The Monarch butterfly’s chemical defenses.
- c)A lichen growing on a tree branch.
- d)The human liver fluke’s life cycle involving two intermediate hosts.
Correct answer is option 'D'. Can you explain this answer?
Which of the following are examples of parasitism?
a)
interaction between sea anemone that has stinging tentacles and the clown fish
b)
The Monarch butterfly’s chemical defenses.
c)
A lichen growing on a tree branch.
d)
The human liver fluke’s life cycle involving two intermediate hosts.
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Bs Academy answered |
the human liver fluke’s life cycle (D) is an example of parasitism, where one species benefits at the expense of another. The other options describe mutualistic or commensal relationships.
Topic in NCERT: Life Cycles of Parasites
Line in NCERT: "The human liver fluke (a trematode parasite) depends on two intermediate hosts (a snail and a fish) to complete its life cycle."
Which of the following factors is most ecologically relevant to living organisms, affecting their metabolism, activity, and physiological functions?- a)Water availability
- b)Temperature
- c)Soil composition
- d)Light intensity
Correct answer is option 'B'. Can you explain this answer?
a)
Water availability
b)
Temperature
c)
Soil composition
d)
Light intensity
|
|
Gayatri Desai answered |
Understanding the Relevance of Temperature to Living Organisms
Temperature plays a crucial role in the ecological functioning of living organisms. It directly influences their metabolism, activity levels, and overall physiological processes. Here’s a detailed look at why temperature is paramount:
1. Metabolic Rate
- Temperature significantly affects the metabolic rates of organisms.
- Most biochemical reactions in living cells are temperature-dependent; as temperature increases, reaction rates typically increase as well, up to an optimum level.
2. Enzymatic Activity
- Enzymes, which are vital for metabolic processes, have specific temperature ranges for optimal activity.
- Deviations from this range can lead to reduced efficiency or even denaturation of enzymes, severely impacting metabolism.
3. Physiological Functions
- Temperature influences physiological functions such as respiration, digestion, and reproduction.
- For example, ectothermic (cold-blooded) animals rely on external temperatures to regulate their body heat, affecting their activity levels.
4. Species Distribution
- Temperature affects the geographic distribution of species.
- Organisms have adapted to specific temperature ranges, and changes in climate can lead to shifts in habitat availability.
5. Interactions Within Ecosystems
- Temperature influences not only individual organisms but also their interactions within ecosystems.
- It impacts predator-prey dynamics, competition, and species relationships.
In summary, while factors like water availability, soil composition, and light intensity are important, temperature is the most ecologically relevant factor affecting the fundamental physiological and metabolic processes of living organisms.
Temperature plays a crucial role in the ecological functioning of living organisms. It directly influences their metabolism, activity levels, and overall physiological processes. Here’s a detailed look at why temperature is paramount:
1. Metabolic Rate
- Temperature significantly affects the metabolic rates of organisms.
- Most biochemical reactions in living cells are temperature-dependent; as temperature increases, reaction rates typically increase as well, up to an optimum level.
2. Enzymatic Activity
- Enzymes, which are vital for metabolic processes, have specific temperature ranges for optimal activity.
- Deviations from this range can lead to reduced efficiency or even denaturation of enzymes, severely impacting metabolism.
3. Physiological Functions
- Temperature influences physiological functions such as respiration, digestion, and reproduction.
- For example, ectothermic (cold-blooded) animals rely on external temperatures to regulate their body heat, affecting their activity levels.
4. Species Distribution
- Temperature affects the geographic distribution of species.
- Organisms have adapted to specific temperature ranges, and changes in climate can lead to shifts in habitat availability.
5. Interactions Within Ecosystems
- Temperature influences not only individual organisms but also their interactions within ecosystems.
- It impacts predator-prey dynamics, competition, and species relationships.
In summary, while factors like water availability, soil composition, and light intensity are important, temperature is the most ecologically relevant factor affecting the fundamental physiological and metabolic processes of living organisms.
Which of the following is not an example of prey-predator relationship ?- a)Tiger eating a deer
- b)Plant Nepenthes trapping an insect
- c)Bacteria decomposing organic matter
- d)Crocodile killing a man
Correct answer is option 'C'. Can you explain this answer?
Which of the following is not an example of prey-predator relationship ?
a)
Tiger eating a deer
b)
Plant Nepenthes trapping an insect
c)
Bacteria decomposing organic matter
d)
Crocodile killing a man
|
|
Mira Joshi answered |
Bacteria decompose the organic matter which is not really living. Hence, it cannot be considered as a prey predator relationship.
Choose the wrong statements
- a)Two species may not live in same habitat
- b)The more dissimilar the niches of two species the stronger is their competition between them
- c)No two species can occupy exactly the same niche in the same geographical area
- d)All of these
Correct answer is option 'C'. Can you explain this answer?
Choose the wrong statements
a)
Two species may not live in same habitat
b)
The more dissimilar the niches of two species the stronger is their competition between them
c)
No two species can occupy exactly the same niche in the same geographical area
d)
All of these
|
|
Dev Patel answered |
According to the competitive exclusion principle, no two species can occupy exactly the same niche in exactly the same habitat at exactly the same time. Two species whose niches overlap may evolve by natural selection to have more distinct niches, resulting in resource partitioning.
So the correct answer is 'No two species can occupy exactly the same niche in the same geographical area.'
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