NEET Biology question
Each question contains ASSERTION (Assertion) and REASON (Reason). Each question has the 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct. **Assertion:** The Nile perch introduced into lake Victoria in East Africa led to the extinction of an ecologically unique assemblage of more than 200 species of cichlid fish in the lake. **Reason:** When alien species are introduced deliberately or for other uses, they often become invasive and cause extinction of indigenous species.
Solution
Both statements are true: the Nile perch, introduced into Lake Victoria as a food fish, did indeed eliminate more than 200 native cichlid fish species, and this is a specific real-world example of the general principle that deliberately introduced alien species often become
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