You are walking along the beach and see the remains of an unknown animal washed up on shore. You examine its characteristics and see that it is gelatinous, transparent, bilaterally symmetric, and lacks tentacles. You provisionally identify its phylum according to which choice?
A) Gelatinous body rules out Cnidaria.
B) Lack of tentacles rules out Cnidaria.
C) Bilateral symmetry rules out Platyhelminthes.
D) Transparent body rules out Ctenophora.
Correct Answer:
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Q20: Water enters the sponge spongocoel through the:
A)
Q21: The flatworms have _ symmetry.
A) radial.
B) asymmetric.
C)
Q22: Common octocorals are the:
A) sea pens.
B) gorgonians.
C)
Q23: Colonial cnidarians that exhibit both the polyp
Q24: Flatworms can reproduce:
A) asexually.
B) sexually.
C) by reciprocal
Q26: The Cnidarians possess:
A) a water vascular system.
B)
Q27: The nematocysts of cnidarians are produced within
Q28: An example of a member of the
Q29: Animals with eight rows of comb plates
Q30: Jellyfish and box jellyfish are:
A) hydrozoans.
B) scyphozoans.
C)
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