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NEET Exam  >  NEET Test  >  Biology Class 12  >  Test: Biodiversity & Conservation - 3 - NEET MCQ

Biodiversity & Conservation - 3 - Free MCQ Practice Test with solutions,


MCQ Practice Test & Solutions: Test: Biodiversity & Conservation - 3 (25 Questions)

You can prepare effectively for NEET Biology Class 12 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Biodiversity & Conservation - 3". These 25 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 25 minutes
  • - Number of Questions: 25

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Test: Biodiversity & Conservation - 3 - Question 1
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What is the primary cause of the extinction of marine species like the Steller's Sea Cow?

Detailed Solution: Question 1

The extinction of marine species like Steller's Sea Cow was primarily caused by over-exploitation by humans, including hunting and overharvesting.

Test: Biodiversity & Conservation - 3 - Question 2
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Which of the following is an example of an ex situ conservation method?

Detailed Solution: Question 2

"Ex situ" conservation involves conserving species outside their natural habitats, such as storing seeds in seed banks, keeping species in zoological parks, or maintaining them in botanical gardens.

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Test: Biodiversity & Conservation - 3 - Question 3
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Which of the following is a significant feature of the "Sixth Extinction"?

Detailed Solution: Question 3

The "Sixth Extinction" is characterized by the fastest rates of species extinction in history, largely caused by human activities such as habitat destruction, pollution, and climate change.

Test: Biodiversity & Conservation - 3 - Question 4
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Which of the following methods is used for preserving gametes of endangered species?

Detailed Solution: Question 4

Cryopreservation is a technique used to preserve gametes (such as sperm and eggs) of endangered species in a viable and fertile condition for long periods, aiding in species conservation.

Test: Biodiversity & Conservation - 3 - Question 5
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What are "sacred groves" in the context of biodiversity conservation?

Detailed Solution: Question 5

Sacred groves are areas where forests are protected and revered by local communities. These groves often harbor rare and endangered species, and they play an important role in biodiversity conservation.

Test: Biodiversity & Conservation - 3 - Question 6
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Which of the following is NOT a major cause of species loss?

Detailed Solution: Question 6

The species-area relationship explains how species richness increases with habitat area, but it is not a cause of species loss. The main causes of species loss include habitat loss, over-exploitation, and biological invasions.

Test: Biodiversity & Conservation - 3 - Question 7
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What is the primary purpose of a seed bank in conservation efforts?

Detailed Solution: Question 7

Seed banks are used to store seeds of endangered plant species, ensuring that genetic diversity is preserved for future restoration or reintroduction into the wild.

Test: Biodiversity & Conservation - 3 - Question 8
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Which of the following is an example of a biodiversity hotspot?

Detailed Solution: Question 8

The Amazon Rainforest is a biodiversity hotspot, known for its exceptional species richness and endemism. It is also critically threatened by habitat loss and human activities.

Test: Biodiversity & Conservation - 3 - Question 9
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Which of the following best describes the concept of biodiversity?

Detailed Solution: Question 9

Biodiversity refers to the combined diversity at all levels of biological organization, which includes genetic, species, and ecological diversity. It encompasses the variety of life forms in ecosystems and their genetic differences.

Test: Biodiversity & Conservation - 3 - Question 10
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Which of the following is a reason for the higher species diversity in tropical regions?

Detailed Solution: Question 10

Tropical regions have had longer evolutionary time and more stable environments compared to temperate areas. This stability promotes greater species diversification and higher biodiversity.

Test: Biodiversity & Conservation - 3 - Question 11
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What is the significance of the regression slope in the species-area relationship?

Detailed Solution: Question 11

The regression slope in the species-area relationship indicates how species richness increases with increasing habitat area. A steeper slope suggests a higher rate of species accumulation as area increases.

Test: Biodiversity & Conservation - 3 - Question 12
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What is the main threat to species from alien species invasions?

Detailed Solution: Question 12

Alien species can become invasive, outcompeting and displacing native species, disrupting local ecosystems and contributing to biodiversity loss.

Test: Biodiversity & Conservation - 3 - Question 13
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What is the main reason for the extinction of species in recent times?

Detailed Solution: Question 13

Habitat loss and fragmentation due to human activities are the primary causes of species extinctions in recent times, often driven by urbanization, agriculture, and deforestation.

Test: Biodiversity & Conservation - 3 - Question 14
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What is the relationship between species richness and area according to the species-area relationship?

Detailed Solution: Question 14

According to the species-area relationship, species richness increases with area, but only up to a certain limit. Beyond this limit, the increase in species richness becomes minimal or levels off.

Test: Biodiversity & Conservation - 3 - Question 15
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What is the main reason for the loss of biodiversity in tropical rainforests?

Detailed Solution: Question 15

Habitat loss due to deforestation is the primary cause of biodiversity loss in tropical rainforests. These forests are being cleared for agricultural activities, urbanization, and logging.

Test: Biodiversity & Conservation - 3 - Question 16
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Which of the following is an example of co-extinction?

Detailed Solution: Question 16

Co-extinction refers to the extinction of a species that causes the extinction of other species dependent on it, such as the loss of a host fish leading to the extinction of its parasitic species.

Test: Biodiversity & Conservation - 3 - Question 17
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Which region of India is known for its exceptional biodiversity and is also a biodiversity hotspot?

Detailed Solution: Question 17

The Western Ghats of India are recognized as a biodiversity hotspot due to their rich species diversity and endemism. They are home to a wide range of plants, animals, and ecosystems.

Test: Biodiversity & Conservation - 3 - Question 18
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What is the primary aim of bioprospecting?

Detailed Solution: Question 18

Bioprospecting involves exploring molecular, genetic, and species-level diversity to discover new products of economic importance, such as medicinal compounds, from natural organisms.

Test: Biodiversity & Conservation - 3 - Question 19
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What is the primary reason why tropical regions have higher species diversity compared to temperate regions?

Detailed Solution: Question 19

Tropical regions receive more solar energy, which contributes to higher productivity and supports a greater diversity of species. This factor, along with longer evolutionary time and more stable environments, helps increase species richness.

Test: Biodiversity & Conservation - 3 - Question 20
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Which of the following is a function of pollinators in ecosystems?

Detailed Solution: Question 20

Pollinators, such as bees, birds, and bats, are crucial for plant reproduction by transferring pollen between flowers, facilitating the fertilization process and enabling the production of fruits and seeds.

Test: Biodiversity & Conservation - 3 - Question 21
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What is the primary goal of the Convention on Biological Diversity?

Detailed Solution: Question 21

The Convention on Biological Diversity aims to conserve biodiversity and promote its sustainable use, ensuring that the benefits derived from biodiversity are accessible to all nations.

Test: Biodiversity & Conservation - 3 - Question 22
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Which of the following is a main driver of habitat fragmentation?

Detailed Solution: Question 22

Habitat fragmentation is primarily driven by human activities, such as urbanization, agricultural expansion, and deforestation, which break large habitats into smaller, isolated patches.

Test: Biodiversity & Conservation - 3 - Question 23
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What does the concept of "in situ" conservation refer to?

Detailed Solution: Question 23

"In situ" conservation involves the protection of species by preserving their natural habitat, such as in national parks, biosphere reserves, and wildlife sanctuaries. It focuses on conservation within the species' natural environment.

Test: Biodiversity & Conservation - 3 - Question 24
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What is the estimated global species diversity according to Robert May?

Detailed Solution: Question 24

Robert May estimates the global species diversity at approximately 7 million species, though the actual number could be higher due to undiscovered species.

Test: Biodiversity & Conservation - 3 - Question 25
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What is the "rivet popper hypothesis" related to biodiversity?

Detailed Solution: Question 25

The "rivet popper hypothesis" compares the loss of species to removing rivets from an airplane. Initially, the plane may function, but as more rivets (species) are removed, the ecosystem becomes weaker and more vulnerable.

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About this NEET Practice Test

This test contains 25 MCQs on Biodiversity & Conservation - 3 with detailed solutions for each question. It is part of the Biology Class 12 course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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