Which of the following features are used to identify chordates?
A) A hollow nerve cord
B) A notochord
C) A tail during embryonic development
D) All of the above are features used to identify chordates.
Correct Answer:
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Q21: Why are echinoderms and chordates closely related?
A)Because
Q22: Roundworms are more closely related to arthropods
Q23: Serial repetition of segments is a defining
Q24: A key characteristic of echinoderms is _.
A)their
Q25: Which phylum is most closely related to
Q27: Flatworms are most closely related to the
Q28: Which of the following characteristics are shared
Q29: The echinoderms are most closely related to
Q30: Most chordates are _.
A)invertebrates
B)vertebrates
C)mammals
D)None of the above
Q31: The body symmetry of adult echinoderms could
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