Question

Introduction of Nile Perch in Lake Victoria of South Africa resulted in
A. Excessive growth of water weeds
B. Elimination of water weeds
C. Elimination of many species of Cichlid fish
D. Excessive growth of Cichlid fish

Answer 1

Hint:By introducing alien species cause disbalance and invasion of indigenous species that results in the loss of biodiversity.

Complete Answer:
Alien species- when any species is introduced intentionally by humans outside from their natural area.
Indigenous species- when any species found naturally in the particular geographical area not introduced by humans. They adapt themselves with the environment. They come to that area by evolutionary process.
Native species- they are closely similar to indigenous species but the only difference is that they come to that area only by natural phenomenon.
Introducing an alien species in an area poorly affects the indigenous species. Indigenous species may cause decline or extinction. Nile Perch is an alien species introduced into lake Victoria, this affects the indigenous species i.e. Cichlid fish. This causes the extinction of 200 species of Cichlid fish. This results in ecological and environmental disbalance. Ultimately, loss of biodiversity.

Hence the correct answer is option ‘C’.

Note:Alien species destroy the habitat, cause diseases and attack as parasites on the native species. Loss of species creates ecological imbalancing and indirectly affects the human and all other creatures.