Echinoderms and chordates are significantly different to all other animal phyla because
A) of their very unusual skin covering.
B) they evolved much later than the others.
C) of their pattern of embryonic development.
D) they have an internal skeleton and notochord.
E) they contain species that are much larger.
Correct Answer:
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Q2: Embryonic development in echinoderms and chordates is
Q3: Which of these statements about echinoderms is
Q4: Although echinoderms appear to have radial symmetry,
Q5: When the spicules of an echinoderm are
Q6: The water vascular system is
A) coelomic in
Q7: The tube feet in echinoderms are extended
Q8: Excretion of nitrogenous wastes in Echinoderms is
Q9: The earliest larval stage of echinoderms
A) is
Q10: Chordates are so named because of their
A)
Q11: At some stage of development, chordates possess
A)
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