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Test: Biodiversity & Conservation - 2 - NEET MCQ


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25 Questions MCQ Test Biology Class 12 - Test: Biodiversity & Conservation - 2

Test: Biodiversity & Conservation - 2 for NEET 2024 is part of Biology Class 12 preparation. The Test: Biodiversity & Conservation - 2 questions and answers have been prepared according to the NEET exam syllabus.The Test: Biodiversity & Conservation - 2 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Biodiversity & Conservation - 2 below.
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Test: Biodiversity & Conservation - 2 - Question 1

Previously how much of the Earth’s land surface was covered by the tropical rain forests?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 1
  • The forests occurring in tropical areas of heavy rainfall are known as tropical rain forests. It has abundant species of wildlife and vegetation.
  • Previously 14 percent of the Earth’s land surface was covered by the tropical rain forests.
Test: Biodiversity & Conservation - 2 - Question 2

Following plants belonging to same genus (Solanum) represent:

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 2

Tomato, potato, Brinjal etc. belongs to genus Solanum although they are of diverse forms. This variation in form represent species diversity belonging to same genus.

Test: Biodiversity & Conservation - 2 - Question 3

What does ‘The Evil Quartet’ describes?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 3

‘The Evil Quartet’ is the sobriquet used to describe the reasons for the decline in the number of species. The four reasons include Loss of habitat and fragmentation, Over-exploitation of species, Invasion of alien (new) species and Co-extinctions.

Test: Biodiversity & Conservation - 2 - Question 4

Which of the benefits, wetlands provide?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 4

Wetland provide benefits like prevention from flood and recharge ground water, social, economic and environmental benefits and being rich in nutrients, they provide a diverse and productive ecosystem.

Test: Biodiversity & Conservation - 2 - Question 5

Out of the following which one will not represent an alternative way to categories ecosystem diversity:

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 5

Biodiversity can be classified on the basis of community, habitat and landscape but not on the basis of population of particular species in the biosphere.

Test: Biodiversity & Conservation - 2 - Question 6

Currently, how much area of the Earth’s land surface is covered by the tropical rain forests?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 6
  • The forests occurring in tropical areas of heavy rainfall are known as tropical rain forests. It has abundant species of wildlife and vegetation.
  • Currently, 6 percent area of the Earth’s land surface is covered by the tropical rain forests.
Test: Biodiversity & Conservation - 2 - Question 7

What are the excess and the unsustainable use of resources called?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 7

The excess and unsustainable use of resources is known as over-exploitation. It is also known as overharvesting. Overexploitation of any kind of resource leads to rapid decline and destruction of that resource that may cause serious damage to the ecosystem.

Test: Biodiversity & Conservation - 2 - Question 8

If snakes become extinct :
i). The loss will make the bionetwork imbalanced
ii). Their gene pool will be lost forever
iii). Result will be loss of biodiversity

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 8

In food chain, each organism has its own role in flow of energy and nutrient cycle. If snakes become extinct the loss will make the biological network imbalanced. Their gene pool will lost forever that results into loss of biodiversity.

Test: Biodiversity & Conservation - 2 - Question 9

Assertion: The pattern of species diversity on earth is not uniformly distributed.

Reason: Species variation is generally highest in the tropics and decreases towards the poles.

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 9

The pattern of species diversity on earth is not uniformly distributed. Species variation is generally highest in the tropics and decreases towards the poles due to variation in temperature.

Test: Biodiversity & Conservation - 2 - Question 10

What happens when alien species are introduced unintentionally or deliberately?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 10
  • The unintentional or deliberate introduction of alien (new) species into a habitat cause the aliens to turn invasive and thus causing the decline or extinction of indigenous species.
  • They can affect all types of organisms (animals, plants, fungi, and microorganisms) and ecosystems.
Test: Biodiversity & Conservation - 2 - Question 11

The legal conversion of land into the status of royal forest refers to:

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 11

The legal conversion of land into the status of royal forest is a kind of afforestation. This conversion of land is done to protect the particular species endemic to area.

Test: Biodiversity & Conservation - 2 - Question 12

Which of the following is a major cause of reduction in gene pool?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 12

Gene pool is the sum total of gemone of different organism of a particular species. Reduction of gene pool is mainly caused by genetic drift along with reasons like geographical isolations.

Test: Biodiversity & Conservation - 2 - Question 13

Which of the following contains chemicals like parthenin, is toxic to cattle and cause pollen allergy in humans?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 13
  • The carrot grass also known as Parthenium is an erect and annual herb. It is responsible for environmental, medical, and agricultural hazards.
  • It contains chemicals like parthenin, is toxic to cattle and causes pollen allergy in humans.
Test: Biodiversity & Conservation - 2 - Question 14

What is Eicchornia called?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 14
  • Eichhornia crassipes also known as water hyacinth.
  • It was first introduced from South America into China that later on became a serious environmental problem.
  • It reduces the sunlight penetration and lowers the oxygen content in the water that hampers the water ecosystem.
Test: Biodiversity & Conservation - 2 - Question 15

The evil quartet described by Jared Diamond doesn’t include :

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 15

Evil quartet are for process that are responsible for loss of biodiversity. It includes fragmentation, overharvesting, introduction of invasive species and habitat degradation. It do not include fission.

Test: Biodiversity & Conservation - 2 - Question 16

Which of the following species had been not recently extinct?  

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 16

The species that had been recently extinct includes Quagga (Africa), Steller’s Sea cow (Russia) and Dodo (Mauritius). Bengal tiger is not extinct so far.

Test: Biodiversity & Conservation - 2 - Question 17

Which of the following group of animals are more venerable to extinction?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 17

Amphibians group of animals are more venerable to extinction. About 33% of amphibians are facing danger of extinction followed by 23% of mammals and 12% of birds species.

Test: Biodiversity & Conservation - 2 - Question 18

The main cause of diversity loss is the

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 18

The main cause of accelerated extinction of species diversity loss is the human activities like deforestation, urbanization, industrialization etc.

Test: Biodiversity & Conservation - 2 - Question 19

Loss of biodiversity in a region may leads to
a. Decline in plant production
b. Lowered resistance to environmental perturbations such as drought.
c. Decreased variability in the ecosystem.

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 19

Loss of biodiversity in a region may leads to ,decline in plant production, lowered resistance to environmental perturbations such as drought and increased variability in certain ecosystem processes.

Test: Biodiversity & Conservation - 2 - Question 20

Why was the African catfish Clarias gariepinus introduced?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 20
  • The African catfish Clarias gariepinus was introduced for aquaculture purposes.
  • The introduction was illegal and posed a threat to the indigenous catfishes in our rivers due to disease introduction, competition, and environmental modification.
Test: Biodiversity & Conservation - 2 - Question 21

Wild animals :
i) Frequently breed in Zoos.
ii) Reproductive capacity is lowered if area of free movement is reduced.

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 21

Reproductive capacity of an animals is lowered if area of free movement is reduced. So, wild animals do not breed frequently in Zoos. So, statement i is wrong and ii is correct.

Test: Biodiversity & Conservation - 2 - Question 22

If a species experiences a 90 percent decline over 10 years (or three generations), would be classified as :

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 22

If a species experiences 90 percent decline over three generation (about 10 years) would be called as critically endangered species. Critically endangered species should be protected to avoid extinction.

Test: Biodiversity & Conservation - 2 - Question 23

Which phenomenon explains that ‘When a species becomes extinct, the plant and animal species also become extinct that are obligatorily associated with the host species’?

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 23
  • Co-extinction is the phenomenon that tells, when a species becomes extinct, the plant and animal species also become extinct that are obligatorily associated with the host species.
  • If a host is extinct the parasite associated with it is also extinct.
Test: Biodiversity & Conservation - 2 - Question 24

To qualify as a biodiversity hotspot , as per Myers hotspot map:
a) it must contain at least 0.5% or 1,500 species of vascular plants as endemics.
b) it has to have lost at least 70% of its primary vegetation.   

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 24

To qualify as a biodiversity hotspot, as per Myers hotspt map, it must contain at least 0.5% or 1500 species of vascular plants as endemics. It must have lost at least 70% of its primary vegetation.

Test: Biodiversity & Conservation - 2 - Question 25

Buffer zone is managed to accommodate variety of resources for restoration of degraded ecosystems and habitats, conservation of genetic resources, species and ecosystem and monitoring of development and conservation programme. It can never extinct species.

Detailed Solution for Test: Biodiversity & Conservation - 2 - Question 25

Buffer zone surrounds the core area and is managed to accommodate variety of resources use strategies, research and education.

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