Question

Define the terms.
a.symbiosis
b.lichens​

Answer 1

Answer:

a) interaction between two different organisms living in close physical association, typically to the advantage of both.

b) a simple slow-growing plant that typically forms a low crusty, leaflike, or branching growth on rocks, walls, and trees.

Hope it helps you.....

Answer 2

Answer:

a.symbiosis

Explanation:

the process in which the host and the parasite are benefited

eg: lichens