Which event is geologically the oldest?

a. evolution of vascular plants
b. evolution of modern humans
c. oxygen accumulation in the Earth's
atmosphere
d. evolution of prokaryotes
e. evolution of reptiles


D

Biology & Microbiology

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A lichen consists of a(n) ________ and an alga (or, in some cases, a cyanobacterium)

Fill in the blank(s) with correct word

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