The ancestors and early members of the phylum ____ were soft-bodied organisms that left few fossils.
A) Protozoa
B) Chordata
C) Bryozoa
D) Mollusca
E) Arthropoda
Correct Answer:
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Q25: What feature distinguishes the two subclasses of
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
Q31: What does the name Placoderm mean?
A)plate-skinned
B)bony skin
C)scaly
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 _
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