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Eichhornia called as 'Terror of Bengal' ...

Eichhornia called as 'Terror of Bengal' is a keystone species.

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alien species.
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What is keystone species ?

Which one is a keystone species?

Write note on: Keystone species.

What are species?

Read the following statements about 'Terror of Bengal' and select the correct ones. (i) 'Terror of Bengal' is the name given to water hyacinth (Eichhornia), an algae. (ii) Eichhornia was introduced in India due to its aesthetic value. (iii) Eichhornia drains oxygen from the water which leads to death of fishes.

What is common to Lantana, Eichhornia and Africa catfish? (a) All are endangered species of India. (b) All are keystone species. (c) All are mammals found in India. (d) All are species are neither threatened nor indigenous species of India.

The removal of keystone species will affect :

Correct the statements by changing underlined words only. Introduction of keystone species reduces the relative abundance of a species in the community.