Which of the following statements are incorrect?
(i) Habitat loss and fragmentation is the most important cause for animals and plants extinction
(ii) Tropical rain forests once covering more than 14 per cent of the earth’s land surface, now cover more than 26 per cent.
(iii) Amazon rain forest is being cut and cleared for cultivation soya beans or for conversion to grasslands for raising beef cattle.
(iv) The degradation of many habitats by pollution also threatens the survival of many species.
(v) The Nile perch introduced into Lake Victoria in east Africa led eventually to the increase of more than 200species of cichlid fish in the lake.
(vi) Carrot grass (Parthenium) is a alien species which threat posed to our native species.
(vii) The recent illegal introduction of the African catfish is posing a threat to the indigenous catfishes in our rivers.
Text Solution
Verified by ExpertsD
Statement (ii) is incorrect because tropical rainforests, which once covered more than 14% of the Earth's land surface, now cover no more than 6%. The statement's claim of an increase to 26% is factually wrong.Statement (v) is incorrect because the introduction of the Nile perch into Lake Victoria led to the extinction (not increase) of an ecologically unique assemblage of more than 200 species of cichlid fish.
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