Biology : XII-CH15 – Biodiversity and Conservation – Assertion and Reason

Read the assertion and reason carefully to mark the correct option.

10 Random question from this chapter are displayed, you can take the quiz multiple times to cover all questions

1 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Tropics have greater biological diversity.

Reason: More solar energy in tropics, contributes to lighter productivity, which in turn may contribute directly to greater biodiversity.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

2 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Sixth extinction presently in progress different from the previous episode.

Reason: Difference is in the rate; current species extinction rates are estimated to be 100 to 1000 times faster than in the pre-human times.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

3 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Most diversified organism on earth is insects.

Reason: insects possess chitinous exoskeleton

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

4 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Removal of key stone from an ecosystem leads to destruction of ecosystem.

Reason: Keystone species drive major ecosystem functions.

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

Both (A) and (R) are true and (R) is correct explanation of the assertion

5 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Colombia located near the equator has nearly 1400 species of birds which New York 41° N has 105 species and green land at 71°N only 56 species.

Reason: Generally tropics harbour more species than temperate or polar region.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

6 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: There are 34 biodiversity hotspots in the world

Reason: High level of species richness is a criterion for selection of a biodiversity hotspot.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

7 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Bioremediation is the use of living organisms, usually prokaryotes, fungi plants, to detoxify polluted ecosystems.

Reason: Biological augmentation uses organisms to add essential materials to a degraded ecosystem.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

8 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: India is one of the 12 mega biodiversity economies of the world.

Reason: India has only 2.4% of the world’s land area. It shares 8.1% if the global species diversity.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

9 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Current estimates do not give any figure for prokaryotes taxonomic.

Reason: Conventional taxonomic methods are not suitable for identifying microbial species.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

10 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Amazon rain forest is called lung of out planet.

Reason: Amazon rain forest produces 80% of total oxygen in Earth’s atmosphere through process of photosynthesis.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

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