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Biology · 2024 · 3 marks
CBSE 2024 · Region 3 · Set 3 · Q27
Explain any three roles of 'predation' in an ecosystem with the help of suitable examples.
Explain any three roles of 'predation' in an ecosystem with the help of suitable examples.
Marking-scheme solution
– Conduit of energy in the ecosystem.
Example: Grass-Goat- Lion / Lion (Predator) transfer the energy fixed by plants in the ecosystem
– Maintain species diversity of prey by reducing intensity of competition.
Example: Extinction of more than $\displaystyle 10$ species of invertebrates due to removal of starfish Pisaster (Predator)
–Keep the population of prey under control
Example: Cactus feeding Moth (predator)controls the spreading of prickly pear cactus.
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CBSE Class 12 Biology past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.