Question

define lichens class 7​

Answer 1

Explanation:

Lichens are bizarre organisms and no two are alike. Lichens are a complex life form that is a symbiotic partnership of two separate organisms, a fungus and an alga. ... The alga can be either a green alga or a blue-green alga, otherwise known as cyanobacteria. Many lichens will have both types of algae.

Answer 2

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Lichen is an organism that is formed by the symbiotic association of a fungus and an alga or cyanobacterium and occurs as crusty patches or bushy growths on tree trunks, bare ground, etc. Ecology 7. Physiology. Lichens constitute a small group of thallophytic and autotrophic plants.