NEET Botany Biodiversity and Conservation Questions Solved


Alien species are highly invasive and are a threat to indigenous species. Substantiate

this statement with any three examples.

Alien (exotic) species invasions are:

(i) Some alien species when introduced unintentionally or deliberately, become invasive

and cause harmful impact resulting in extinction of the indigenous species.

(ii) Nile perch, a large predator fish when introduced in lake Victoria in East Africa 

caused the extinction of an ecologically unique species of Cichild fish in the lake.

(iii) Invasive weed species like Parthenium, Lantana and Eicchornia caused

environmental damage and posed threat to our native species.

(iv) Introduction of African catfish for aquaculture purposes is posing a threat to the 

indigenous cat fishes of Indian rivers.

Difficulty Level:

  • 95%
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