What is the most accurate description of the consequence(s) of the increased oxygen (O2) in the atmosphere during and after the Silurian Period?
A) Conquest of land by arthropods.
B) Conquest of land by arthropods and vertebrates.
C) Increases in animal body sizes and appearance of shelled organisms.
D) Conquest of land by arthropods and vertebrates,and plants.
E) Conquest of land by arthropods and vertebrates and an increase in animal body sizes.
Correct Answer:
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