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What are alien species?...

What are alien species?

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Alien species are organisms often introduced in a habitat unintentionally or deliberately for commercial purpose or a biological control agent and other uses.
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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 for economic or other uses, they often become invasive and cause extinction of indigenous species. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false.

Invasion of alien species disrupts ecosystem processes. Justify.

The alien species introduced into Lake Victoria that was responsible for the extinction of cichlid fishes is

Around 200 types of Cichlid fish species became extinct because of introduction of Nile Perch, an invasive and alien species in