CBSE Class 12-science Answered
Alien species are a threat to
native species. Justify taking examples of an animal and a plant alien
species.
Asked by Topperlearning User | 10 Jun, 2014, 03:26: PM
Expert Answer
The species that have been introduced from another geographic region to an area outside its natural range are called alien species or exotic species. For example
(i) Parthenium, Lantana and Eicchornia are the alien species of plants that have invaded the native species of India and caused environmental damage.
(ii) Introduction of African catfish Clarias gariepinus for aquaculture purpose is posing threat to many indigenous catfish.
(iii) Nile perch introduced into lake Victoria in East Africa led to the extinction of cichlid fish.
Answered by | 10 Jun, 2014, 05:26: PM
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