Answer:
the first wave of extinction may be related to rapid cooling at the end of the Ordovician Period, and the second phase is widely regarded as having been caused by the sea-level fall associated with the glaciation.
Answer:
Net force=120N-90N=30N
30N to the right
It’s D. multi-cellular organisms. Differentiated cells are important in a multicellular organism because they are able to preform a specialized function in the body.
I believe the answer is restriction organism.