Question

lichens are composite of which two organisms? what type of nutritional relationship exists here?​

Answer 1

Answer:

Lichens are made up of two or more closely interacting organisms, a fungus, and one or more partners, called photobionts. The photobiont may be an alga and/or cyanobacteria, both of which can produce simple sugars by photosynthesis. In contrast, fungi are 'heterotrophic' and require an external source of food.

Explanation:

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