Question:

With respect to Eichorrnia: Statement X : It drains off Oxygen from water and is seen growing in standing water. Statement Y : It is an indigenous species of our country

Updated On: May 30, 2022
  • Only statement X is correct and Y is wrong
  • Both statements X and Y are correct
  • Only statement Y is correct and X is wrong
  • Both statements X and Y are wrong.
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The Correct Option is A

Solution and Explanation

Eichhornia is an alien or exotic species. This plant was introduced in India because of its beautiful flowers and shape of leaves. It can propagate vegetatively at a phenomenal rate and spread all over the water body in a short period of time. It drains off oxygen from water, which leads to death of fishes. It is also known as ?Terror of Bengal?.
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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.