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Biology · 2025 · 3 marks
CBSE 2025 · Region 5 · Set 1 · Q27
Explain how the loss of habitat and fragmentation drives plants and animals to extinction with the help of an example of habitat loss in the Tropical…
Explain how the loss of habitat and fragmentation drives plants and animals to extinction with the help of an example of habitat loss in the Tropical Rain Forest. Also write the effect of fragmentation of a habitat on the population decline.
Marking-scheme solution
• The Amazon rain forest is being cut and cleared for cultivating soya beans or for
conversion of grasslands for raising beef cattle which threaten survival of many species.
• When large habitats are broken up into small fragments mammals and birds requiring
large territories, and certain animals with migratory habits are badly affected leading to their extinction or population decline.
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.