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Shankar IAS Test: Biodiversity - UPSC MCQ


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20 Questions MCQ Test Famous Books for UPSC Exam (Summary & Tests) - Shankar IAS Test: Biodiversity

Shankar IAS Test: Biodiversity for UPSC 2024 is part of Famous Books for UPSC Exam (Summary & Tests) preparation. The Shankar IAS Test: Biodiversity questions and answers have been prepared according to the UPSC exam syllabus.The Shankar IAS Test: Biodiversity MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Shankar IAS Test: Biodiversity below.
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Shankar IAS Test: Biodiversity - Question 1

Match the Pairs

Detailed Solution for Shankar IAS Test: Biodiversity - Question 1

The definitions of these categories match with the given statements based on the IUCN's criteria for classification.

Shankar IAS Test: Biodiversity - Question 2

Assertion (A): The number of pink pages in the Red Data Book is increasing.
Reason (R): More species are being classified as Critically Endangered.

Detailed Solution for Shankar IAS Test: Biodiversity - Question 2

Pink pages represent critically endangered species. The increase in pink pages indicates a rise in the number of species falling into this category.

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Shankar IAS Test: Biodiversity - Question 3

Which of the following species is categorized as Critically Endangered?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 3

According to the information provided, the Great Indian Bustard is listed as Critically Endangered.

Shankar IAS Test: Biodiversity - Question 4

What does the presence of Indicator species in an ecosystem indicate?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 4

Indicator species signal the presence of certain environmental conditions such as pollution, climate change, etc.

Shankar IAS Test: Biodiversity - Question 5

Arrange the following IUCN categories in the order of increasing risk of extinction:

  1. Vulnerable (VU)
  2. Endangered (EN)
  3. Near Threatened (NT)
  4. Critically Endangered (CR)
Detailed Solution for Shankar IAS Test: Biodiversity - Question 5

Near Threatened has the least risk, followed by Vulnerable, Endangered, and Critically Endangered with the highest risk.

Shankar IAS Test: Biodiversity - Question 6

Which category in the Red Data Book indicates species that were once endangered but have now recovered?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 6

Green pages denote species that were endangered but are no longer under threat.

Shankar IAS Test: Biodiversity - Question 7

A keystone species is essential in an ecosystem because:

Detailed Solution for Shankar IAS Test: Biodiversity - Question 7

Keystone species play a crucial role in maintaining the structure of an ecological community, affecting many other organisms.

Shankar IAS Test: Biodiversity - Question 8

Which of the following is NOT a criterion for classifying a species as Vulnerable?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 8

A population size fewer than 250 mature individuals is a criterion for classifying a species as Endangered, not Vulnerable.

Shankar IAS Test: Biodiversity - Question 9

What does a taxon labeled as 'Data Deficient' in the IUCN Red List indicate?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 9

'Data Deficient' indicates a lack of enough information to classify the species in any other risk category.

Shankar IAS Test: Biodiversity - Question 10

Which of the following is an example of a foundation species?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 10

Kelp is a dominant primary producer in its ecosystem, making it a foundation species.

Shankar IAS Test: Biodiversity - Question 11

Match the Pairs

Detailed Solution for Shankar IAS Test: Biodiversity - Question 11

The given options correctly define the respective IUCN categories.

Shankar IAS Test: Biodiversity - Question 12

What is the primary function of keystone species in an ecosystem?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 12

Keystone species play a critical role in maintaining the structure of an ecological community, influencing other species' populations and the overall balance.

Shankar IAS Test: Biodiversity - Question 13

Which IUCN category applies to a species with a probability of extinction in the wild of at least 20% within 20 years?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 13

The Endangered category includes species with a high risk of extinction, as defined by the stated probability.

Shankar IAS Test: Biodiversity - Question 14

The Red Data Book's use of 'Red' symbolically represents:

Detailed Solution for Shankar IAS Test: Biodiversity - Question 14

The term 'Red' symbolizes the critical danger that numerous species around the world are facing.

Shankar IAS Test: Biodiversity - Question 15

Assertion (A): The number of green pages in the Red Data Book is relatively low.
Reason (R): Green pages indicate species that have moved out of the endangered category due to successful conservation efforts.

Detailed Solution for Shankar IAS Test: Biodiversity - Question 15

The low number of green pages reflects the limited success of conservation efforts in moving species out of endangered status.

Shankar IAS Test: Biodiversity - Question 16

Indicator species are crucial for:

Detailed Solution for Shankar IAS Test: Biodiversity - Question 16

Indicator species are used to signify the presence of certain environmental conditions and specific sets of species.

Shankar IAS Test: Biodiversity - Question 17

A species categorized as 'Data Deficient' by the IUCN:

Detailed Solution for Shankar IAS Test: Biodiversity - Question 17

'Data Deficient' indicates that there is not enough information available to classify the species under a specific risk category.

Shankar IAS Test: Biodiversity - Question 18

Which of the following is true about a taxon labeled as 'Not Evaluated'?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 18

'Not Evaluated' means the species hasn't been assessed for its risk of extinction according to the IUCN's criteria.

Shankar IAS Test: Biodiversity - Question 19

What does the increasing number of pink pages in the Red Data Book signify?

Detailed Solution for Shankar IAS Test: Biodiversity - Question 19

Pink pages represent critically endangered species; an increase indicates a growing number of species falling into this high-risk category.

Shankar IAS Test: Biodiversity - Question 20

The primary role of foundation species in an ecosystem is to:

Detailed Solution for Shankar IAS Test: Biodiversity - Question 20

Foundation species play a fundamental role in creating and defining an ecosystem, often being the primary producers and providing critical support for other species.

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