Organisms that are radially symmetrical have_________ embryonic germ layers.
A) two
B) three
C) four
D) five
E) six
Correct Answer:
Verified
Q7: How many tissue layers are in the
Q8: The only animals that lack tissues are
A)
Q9: Which of the following characteristics is often
Q10: A multicellular organism that lacks cell walls
Q11: Damage to the embryonic ectoderm would show
Q13: Between the organs and the body wall,
Q14: An arthropod embryo has _germ layer(s).
A) no
B)
Q15: One trend in the evolution of animals
Q16: In the animal kingdom, cephalization is
A) development
Q17: The skin and nervous tissues develop from
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