NCERT CLASS 12 | TOPIC : BIODIVERSITY AND CONSERVATION | ARQB | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 12 | TOPIC : BIODIVERSITY AND CONSERVATION | ARQB | NEET BIOLOGY ONLINE TEST

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It contains 21 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : kalvisolai.net

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1 ➤ 91.

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

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

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

2 ➤ 92.

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Assertion: Tropics have greater biological diversity.

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Reason: Tropics have long evolutionary time for species diversification is one of the reasons.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

3 ➤ 93.

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Assertion: Stable community must be either resistant or resilient to occasional disturbances.

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Reason: Stable community not shows too much variation in productivity from year to year.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

4 ➤ 94.

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

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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.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

5 ➤ 95.

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

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

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

6 ➤ 96.

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Assertion: Steller’s sea cow becomes extinct.

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Reason: It is due to over exploitation by humans.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

7 ➤ 97.

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Assertion: Biodiversity hotspots are example of in situ conservation.

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Reason: It is a conservation of biological wealth on site.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

8 ➤ 98.

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Assertion: Ex situ conservation is carried out in biosphere reserves, national parks and sanctuaries.

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Reason: NGOs are involved in the maintenance of these protected areas.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

9 ➤ 99.

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Assertion: Insects are enormously diversified.

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Reason: It is because of the presence of exoskeleton made up of chitin.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

10 ➤ 100.

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Assertion: Habitat loss and fragmentaion is the most important cause driving animals and plants to extinction.

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Reason: Habitat loss and fragmentaion causes alien species invasion.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

11 ➤ 101.

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Assertion: India has more than 50000 genetically different strains of rice.

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Reason: India has approximately 1000 varieties of mango

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

12 ➤ 102.

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Assertion: According to the IUCN (2004), the total number of plant and animal species described so far is lightly more than 1.5 million.

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Reason: For many taxonomic groups, species inventories are more complete in temperate than in tropical areas.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

13 ➤ 103.

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Assertion: Most diversified organism on earth is insects.

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Reason: insects possess chitinous exoskeleton

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

14 ➤ 104.

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Assertion: The diversity of microbes may run into millions.

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Reason: If we use biochemical or molecular criteria to estimate microbial species.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

15 ➤ 105.

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

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

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

16 ➤ 106.

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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.

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

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

17 ➤ 107.

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Assertion: Tropics have greater biological diversity.

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

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

18 ➤ 108.

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

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Reason: Keystone species drive major ecosystem functions.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

19 ➤ 109.

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

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

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

20 ➤ 110.

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Assertion: There are 34 biodiversity hotspots in the world

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

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

21 ➤ 111.

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Assertion: Species richness is also function of the area of a region.

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Reason: The species area relationship is generally a rectangle hyperbolic function.

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(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion . (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

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