What does the name Placoderm mean?
A) plate-skinned
B) bony skin
C) scaly skin
D) spiny skin
E) fleshy skin
Correct Answer:
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Q26: At the end of the Paleozoic era,
Q27: The earliest fish were _.
A)ray-finned
B)boney-finned
C)cartilaginous
D)jawless
E)jawed
Q28: The crossopterygians were well-adapted to move onto
Q29: Why do most experts agree that the
Q30: The ancestors and early members of the
Q32: The mass extinction at the end of
Q33: What is the correct order of trophic
Q34: _ reefs were dominated by crinoids, blastoids,
Q35: The distribution of the land plant _
Q36: _ evolved in response to the need
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