During Silurian, jaws in fish evolved from
A) jaw muscles.
B) claws and pincers.
C) denticles within fish skin.
D) bars that supported gills.
Correct Answer:
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Q1: _ is a predatory arthropod group, which
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Q4: A group of "bony skin" fishes new
Q5: During Early Devonian and Middle Silurian, what
Q6: Among the first terrestrial invertebrate animals were
Q7: Perhaps the greatest change in the nature
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