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Case Based Questions Test: Biodiversity & Conservation - NEET MCQ


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15 Questions MCQ Test Biology Class 12 - Case Based Questions Test: Biodiversity & Conservation

Case Based Questions Test: Biodiversity & Conservation for NEET 2024 is part of Biology Class 12 preparation. The Case Based Questions Test: Biodiversity & Conservation questions and answers have been prepared according to the NEET exam syllabus.The Case Based Questions Test: Biodiversity & Conservation MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Case Based Questions Test: Biodiversity & Conservation below.
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Case Based Questions Test: Biodiversity & Conservation - Question 1

Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

Q. How many biodiversity hot-spots are identified globally ?

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 1
There are more than 30 biodiversity hot-spots in the world. India has 4 biodiversity hot-spots.
Case Based Questions Test: Biodiversity & Conservation - Question 2

Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

Q. Name the National Aquatic Animal of India ?

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 2
River dolphin is India's national aquatic animal. To save dolphins from extinction, the Union government has declared them as the national aquatic animal.
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Case Based Questions Test: Biodiversity & Conservation - Question 3

Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

Q. Main cause of extinction of animals and plants is :

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 3
Due to habitat loss animals migrate and lose their favourable condition, food, temperature, water that makes it difficult to survive and become extinct.
Case Based Questions Test: Biodiversity & Conservation - Question 4

Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

Q. Species at the high risk of extinction in the future is called :

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 4
The species of an organism lasting with the change in suitable condition of survival with the time. Such species are called critically endangered.
Case Based Questions Test: Biodiversity & Conservation - Question 5

Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

Q. Protected areas are example of

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 5

Protected areas, such as national parks, wildlife sanctuaries, biosphere reserves, and conservation reserves, are examples of in-situ conservation. In-situ conservation involves the protection of species in their natural habitat, allowing for the conservation of ecosystems and natural processes, thereby supporting the conservation of biodiversity within their own environment. Therefore, the correct answer is: In-situ conservation

Case Based Questions Test: Biodiversity & Conservation - Question 6

India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

Q. Which among the following represents diversity at ecosystem level ?

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 6
Diversity of plants and animals in the ecosystem is called ecological diversity.
Case Based Questions Test: Biodiversity & Conservation - Question 7

India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

Q. When does the group represent minimum species diversity among vertebrates ?

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 7

Species diversity among vertebrates varies greatly across different groups, including birds, mammals, reptiles, and amphibians. The diversity can be measured in terms of the number of species within each group and their distribution across different habitats and geographical areas.

  • Birds are known for their extensive diversity, with over 10,000 species worldwide, adapting to almost every environment on Earth.
  • Mammals also exhibit significant diversity, with approximately 6,400 species identified, ranging from the smallest bumblebee bat to the largest blue whale.
  • Reptiles include a wide variety of lizards, snakes, turtles, and crocodiles, with over 10,000 species. They are diverse but not as widely distributed as birds and mammals, especially in colder climates.
  • Amphibians, which include frogs, toads, salamanders, and newts, have around 8,000 species. They are generally more sensitive to environmental changes and habitat destruction, making them more vulnerable to extinction.

Considering the numbers and the factors affecting their diversity, amphibians often represent the group with the minimum species diversity among vertebrates, especially when considering their vulnerability to environmental changes, habitat loss, and a higher rate of decline compared to birds, mammals, and reptiles.
Therefore, the correct answer is: Amphibians

Case Based Questions Test: Biodiversity & Conservation - Question 8

India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

Q. Which of the following taxon shows maximum species diversity ?

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 8
Beatles show maximum diversity in species as they represent the largest order of insects.
Case Based Questions Test: Biodiversity & Conservation - Question 9

India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

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) : Tropics have more biodiversity.

Reason (R) : Climate of the tropical region is more seasonal.

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 9
Tropics have more biodiversity due to warm temperature and high humidity.
Case Based Questions Test: Biodiversity & Conservation - Question 10

India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

Q. What is the approximate ratio of animals and plant species in our country ?

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 10
Ratio of plants and species in India is 2 : 1.
Case Based Questions Test: Biodiversity & Conservation - Question 11

Read the following text and answer the following question on the basis of the same:

Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

Q. Identify a cause of biodiversity loss that is not included in the evil quartet?

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 11
Evil quartet, i.e., four major causes of biodiversity loss are habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction.
Case Based Questions Test: Biodiversity & Conservation - Question 12

Read the following text and answer the following question on the basis of the same:

Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

Assertion : Pollution reduces species biodiversity.

Reason : Spillover of oil in the sea causes the death of several marine animals.

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 12

The assertion that "Pollution reduces species biodiversity" is true. Pollution can have numerous detrimental effects on ecosystems, leading to a decrease in species diversity. This happens through direct harm to organisms (such as toxicity leading to death or illness), habitat degradation, and indirect effects like altering food chains.

The reason given, "Spillover of oil in the sea causes the death of several marine animals," is also true. Oil spills are a form of pollution that has devastating effects on marine environments, harming or killing marine animals and birds, damaging ecosystems, and reducing biodiversity as a result.

However, while both the assertion and the reason are true, the reason provided is an example of how pollution can affect biodiversity but not the sole explanation for the assertion. Pollution encompasses a wide range of harmful substances and activities beyond just oil spills, including plastic pollution, chemical runoff, air pollution, and more, all of which can reduce species biodiversity.

Correct option is C. Both assertion and reason are true but reason is not the correct explanation of assertion.

Case Based Questions Test: Biodiversity & Conservation - Question 13

Read the following text and answer the following question on the basis of the same:

Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

Q. The species that have become extinct due to over exploitation is/are :

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 13
Steller's sea cow has become extinct in the last 500 years due to overexploitation by humans.
Case Based Questions Test: Biodiversity & Conservation - Question 14

Read the following text and answer the following question on the basis of the same:

Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

Q. ___________is the first major cause of species extinction.

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 14
Habitat destruction is an important cause of known extinctions. As deforestation proceeds in tropical forests, this promises to become THE cause of mass extinctions caused by human activity.

All species have specific food and habitat needs. The more specific these needs and localized the habitat, the greater the vulnerability of species to loss of habitat to agricultural land, livestock, roads and cities. In the future, the only species that survive are likely to be those whose habitats are highly protected, or whose habitat corresponds to the degraded state associated with human activity (human commensals).

Case Based Questions Test: Biodiversity & Conservation - Question 15

Read the following text and answer the following question on the basis of the same:

Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

Q. Factors which make species susceptible to extinction are:

Detailed Solution for Case Based Questions Test: Biodiversity & Conservation - Question 15
Population traits which make species susceptible to extinction are: small population, higher status of trophic level and inability to switch over to alternate foods.
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