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Introduction & Types
Magnitude of Biodiversity
Biodiversity Patterns
Importance of Biodiversity
Loss of Biodiversity
In Situ Conservation of Biodiversity
Ex Situ Conservation of Biodiversity
Biodiversity Conservation
Q. No.
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): If introduced species evolved under great competition or predation in their native habitat, they are more likely to become invasive in the introduced habitat.
Reason (R): Then the new environment may host fewer able competitors, allowing the invader to proliferate quickly.

In the light of the above statements, choose the most appropriate answer from the options given below :

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and reason are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Loss of Biodiversity |
 68%

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Hints

The most serious negative impact of loss of biodiversity on humans would be due to:
1. global warming and ozone depletion.
2. loss of ecosystem services.
3. loss of source of genetic diversity to preserve endangered species.
4. loss of species for ʺbioprospecting.ʺ

Subtopic:  Loss of Biodiversity |

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Hints
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Certain exotic species, introduced into a geographical area, become invasive.
Reason (R): The exotic species that become invasive can only be plants that can reproduce asexually very rapidly.

In the light of the above statements, choose the most appropriate answer from the options given below :

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Loss of Biodiversity |
 67%

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Hints

The most effective biologic control of insects is achieved by:

1.insectivorous birds2.biocides
3.parasitoid wasps4.parasitic nematodes

Subtopic:   Biodiversity Conservation |

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Hints

Which one of the following is not a major characteristic feature of biodiversity hotspots?
1. A large number of species
2. Abundance of endemic species
3. Mostly located in the tropics
4. Mostly located in the polar regions

Subtopic:  Biodiversity Patterns |
 82%
From NCERT

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Island ecosystems are generally more prone to invasion by the introduced species.
Reason (R): Invasion is more likely in ecosystems that was similar to the one in which the potential invader evolved.
In the light of the above statements, choose the most appropriate answer from the options given below :
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Loss of Biodiversity |

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Hints

Biodiversity hotspots are characterized by:
1. High number of endemic species and low threat of extinction
2. Low number of endemic species and low threat of extinction
3. Low number of endemic species and high threat of extinction
4. High number of endemic species and high threat of extinction

Subtopic:  In Situ Conservation of Biodiversity |
 65%
From NCERT

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Match each item in Column I with one in column II and select the correct answer from the codes given:

 

COLUMN I

 

COLUMN II

A

Dodo

P

Bird

B

Thylacine

Q

Zebra

C

Quagga

R

Marsupial

D

Steller’s sea cow

S

Aquatic mammal

Codes:

A

B

C

D

1.

P

Q

R

S

2.

P

Q

S

R

3.

P

R

Q

S

4.

S

R

Q

P
Subtopic:  Loss of Biodiversity |
 58%

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Between community, diversity is known as:

1.alpha diversity2.beta diversity
3.gamma diversity4.delta diversity

Subtopic:  Introduction & Types |
 60%

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Which one of the following is an endangered plant species in India?

1.Rauwolfia serpentine2.Santalum album (Sandalwood)
3.Cycasbeddonel4.All of these

Subtopic:  Loss of Biodiversity |
 78%
From NCERT

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Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Select Chapter Topics:
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Introduction & Types
Magnitude of Biodiversity
Biodiversity Patterns
Importance of Biodiversity
Loss of Biodiversity
In Situ Conservation of Biodiversity
Ex Situ Conservation of Biodiversity
Biodiversity Conservation
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