Multiple Choice
Echinoderms
A) are clearly related to cnidarians because of their radial symmetry.
B) may have evolved from a sessile ancestor.
C) probably evolved from pterobranch hemichordates.
D) do not show relationships to any other group of animals.
Correct Answer:
Verified
Correct Answer:
Verified
Q18: The water vascular system of sea stars
Q19: The five pairs of bursae in brittle
Q20: During metamorphosis of sea stars,the left side
Q21: Water for suspension feeding in the hemichordates
Q24: A system of unknown function in echinoderms,consisting
Q25: Of the echinoderms,regeneration and autotomy are most
Q26: The Chaetognatha appear to be morphologically similar
Q27: Characteristics of the hemichordates that are shared
Q28: The ophiuroids have no<br>A)pedicellariae.<br>B)papulae.<br>C)anus.<br>D)all of these
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