Alichen is best described as:
a) a plant.
b) a fungus.
c) an alga.
d) a symbiotic relationship between algae or cyanophyta; and fungi.

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians? a. a b. e c. f d. g