Question:

Dodo, passenger pigeon and Steller's sea cow became extinct in the last $500$ years due to

Updated On: Jul 6, 2022
  • habitat destruction
  • over-exploitation
  • bird-flu virus infection
  • pollution
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The Correct Option is B

Solution and Explanation

Excessive exploitation of a species, whether a plant or animal reduces size of its population such that it becomes vulnerable to extinction. Dodo, passenger pigeon and Steller's sea cow have become extinct in the last $500$ years due to overexploitation by humans.
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Notes on Biodiversity and Conservation

Concepts Used:

Biodiversity and Conservation

The term ‘biodiversity’ is derived from the two words- ‘bios' which means life and ‘diversity’ i.e, differentiation or variation. Edward Wilson, the sociobiologist was the first to popularise the term ‘biodiversity’ in the year 1992. The term implies the occurrence of various plants and animals along with their variants such as biotypes, ecotypes and genes on earth. In our biosphere, the immense diversity or heterogeneity remains not only at the species level but also, at every level of biological organization that ranges from macromolecules in the cells to biomes.

Biodiversity and Conservation is a topic covered under the fifteenth chapter and Unit 5 of NCERT class 12 biology.