Which of the following animal phyla is distinguished by a lack of tissues?
A) echinoderms
B) flatworms
C) annelids
D) roundworms
E) sponges
Correct Answer:
Verified
Q3: The common ancestor of sponges and other
Q4: Anemones have no:
A)endoderm.
B)mesoderm.
C)ectoderm.
Q5: In the animal kingdom, cephalization is:
A)development of
Q6: How many tissue layers are in the
Q7: The major difference between protostomes and deuterostomes
Q9: A _ is an organism whose body
Q11: Which of the following characteristics is often
Q12: Which of the following characteristics is associated
Q12: Organisms that are radially symmetrical have_ embryonic
Q14: An arthropod embryo has _germ layer(s).
A) no
B)
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