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The alien species (Nile perch) introduce...

The alien species (Nile perch) introduced into Lake Victoria in

A

South Africa

B

North America

C

South America

D

East Africa

Text Solution

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The correct Answer is:
D
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Consider the following six statements (a-e) about causes of biodiversity losses. a. Tropical rain forests once covering more than 14% of the earth's land surface, these forests now cover no more than 0.6%. b. Biological system should not be exploited beyond the degree of their renewability. c. Nile perch, a large predator fish was introduced into Lake Victoria of East Australia. d. Lantana is an indigenous plant of our country. e. Recent illegal introduction of the American catfish for aquaculture purpose is posing a threat to the indigenous catfishes in our rivers. Which of the above statement(s) is/are correct?

Mark true or false in the following statements. (i) Habitat loss and fragmentation is the most important cause driving animals and plants to extinction. (ii) Steller's sea cow has been extinct due to habitat loss. (iii) When alien species are introduced deliberated or unintentionally for whatever purpose, some of them turn invasive and cause extinction of indigenous species. (iv) When a host fish species becomes extinct its unique assemblage of parasites also meets the same fate.

Knowledge Check

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

    A
    African catfish
    B
    Water hyacinth
    C
    Carrot grass
    D
    Nile perch

  • 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.

  • Alien species introduced into lake Victoria that was responsible for the extinction of cichilid species is

    A
    African Catfish
    B
    Murrels
    C
    Water Hyacinth
    D
    Nile perch

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