A cnidarian, which is radially symmetrical, has _________germ layer(s) .
A) no
B) one
C) two
D) three
E) four
Correct Answer:
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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
Q19: All animals with tissues have
A) radial symmetry.
B)
Q20: Which of the following characteristics is associated
Q21: The simplest multicellular animals that have only
Q22: Giant squids are classified as
A) echinoderms.
B) chordates.
C)
Q23: The currents of water (containing food) that
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