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Lichens are a well known combination of an alga and a fungus where fungus has

1. an epiphytic relationship with the alga
2. a parasitic relationship with the alga
3. a symbiotic relationship with the alga
4. a saprophytic relationship with the alga

Correct answer: a symbiotic relationship with the alga

Solution

In lichens, the fungus and alga live together in a mutually beneficial association. The alga makes food by photosynthesis, while the fungus provides protection, water, and minerals.

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