Which phylum of worms includes the leeches?
A) Flatworms
B) Annelids
C) Roundworms
D) None of these
Correct Answer:
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Q7: What happened during the Cambrian explosion?
A)Many large
Q9: What do sponges and cnidarians have in
Q13: The radial symmetry of adult echinoderms could
Q15: Most animals fall into one of how
Q16: Gastropods include the _.
A)clams and oysters
B)snails and
Q17: Many, though not all, mollusks have a
Q18: How do sponges acquire their nourishment?
A)They catch
Q19: Some organisms are described as having a
Q20: What defines radial symmetry?
A) Any plane of
Q23: Serial repetition of segments is a defining
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