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प्रश्न
Lichen is considered a good example of obligate mutualism. Explain.
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उत्तर
- Lichen is a good example of obligate mutualism because it is a symbiotic association between two organisms: a fungus (mycobiont) and an alga or cyanobacterium (phycobiont).
- The fungus provides shelter, moisture, and nutrients to the alga, while the alga performs photosynthesis to produce food that both organisms use.
- This association is obligate, as both partners depend on each other for survival and cannot live independently for long.
- Hence, lichen exemplifies obligate mutualism, where both partners benefit and are interdependent.
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