Which of the following is the roost direct threat to biodiversity? Ozone depleti

Question

Which of the following is the roost direct threat to biodiversity? Ozone depletion overexploitation habitat destruction increased CO_2 disease Which of the following ecological locations has the highest abundance of polar ice deciduous forests tropic rain forest grasslands chaparral Introduced species can have deleterious effects on the biological communities preying on native species competing with native species for food displacing native species competing with native species for space or breeding habitat all of the above are correct Movement corridors are the routes taken by migratory animals. strips or clumps of habitat that connect isolated fragments of habitat landscapes of different ecosystems the edge effect

Explanation / Answer

Q 90: A chance event leading to the loss of individuals in a population along with alleles is genetic drift due to bottle necking which may be due to chance event. Hence option D: genetic drift is correct

91. Removal of an endangered species from the wild and introduction new genes into it in a breeding program is an example of Captive restoration as it is an insurance” against genetic loss (KD Arkush).   Hence option : E is correct

92: The most direct threat to biodiversity is habitat destruction. As habitat is the very place where an organism lives. Hence the option ( C ) is correct

93. Tropical rain forests have highest biodiversity. Hence the option ( c ) is correct

94. Introduced species can have deleterious effects on the biological communities by all the mentioned factors, i.e. by: preying, competing for food, shelter i.e. all resources and displacement of the native species, hence the option: E all of the above is true.

95. Movement corridors are strips of habitat that connect isolated fragments of habitat. Hence the option B is correct. Hence movement corridor is a way of connecting fragmented and isolated patches of habitat.

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