Biology, asked by shivirai8469, 10 months ago

(a) What are lichens? Give two examples and one use of it?(b) Name the excretory organs of following: (i) Cockroach (ii) Leech

Answers

Answered by Inderjeetmaan791

4

Answer:

Explanation:

Lichens are the symbiotic association of the fungi and alga.

Use

Lichens are natural indicators of So2 gas.

They are natural pollution indicators.

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