Which body plan is characterizeby simplgas exchangmechanisms, two-way traffic through a highly branched, saclikgut, ana thin, flat body with all cells fairly closto thgut?
A) cnidarian
B) roundworm
C) echinoderm
D) flatworm
E) sponge
Correct Answer:
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Q34: Nematocysts are
A) reproductive cells.
B) excretory organs.
C) sets
Q51: Squids arexamples of
A)cephalopods.
B)pseudopods.
C)monopods.
D)gastropods.
E)polypods.
Q52: Which of thfollowing organisms possesses a segmentebody
Q53: Snails arexamples of
A)cephalopods.
B)pseudopods
C)monopods.
D)gastropods.
E)polypods.
Q54: Molting is
A)the anterior attachment of a tapeworm.
B)the
Q55: Bilateral symmetry is characteristic of a
A)cnidarian
B)roundworm
C)echinoderm
D)corals
E)flatworm
Q58: Flatworms have
A)one sex.
B)both sexes.
C)only the male sex.
D)only
Q59: Cephalopods arthonly mollusks that possess
A)a mantle.
B)gills.
C)a closed
Q60: Cephalopods
A)are predators.
B)move by jet propulsion.
C)have a radial
Q61: Which group is strictly marinwith no freshwater
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