Between the organs and the body wall, complex animals have a body cavity called a
A) mesoderm.
B) thorax.
C) coelom.
D) cnidarian.
E) mesoglea.
Correct Answer:
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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
Q12: Organisms that are radially symmetrical have_ embryonic
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
Q18: A cnidarian, which is radially symmetrical, has
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