The ancestor of the animal clade was probably a
A) colonial flagellated protist.
B) triploblastic acoelomate with spiral cleavage.
C) ciliated protist.
D) ctenophore.
E) None of the above
Correct Answer:
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Q7: In the common ancestor of protostomes and
Q8: A fluid-filled body cavity can function as
Q9: Bilateral symmetry
A) is found only among bilaterians.
B)
Q13: Which of the following is a synapomorphy
Q14: Among protostomes, cleavage of the fertilized egg
Q15: Which of the following features is a
Q16: The body plan of an animal is
A)
Q17: Spiral cleavage is found in which of
Q24: Which of the following is not considered
Q37: Cephalization is most commonly associated with
A) spherical
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