In sponges, the ostium is
A) a pore in the external wall through which water is drawn for feeding.
B) the central cavity of the body.
C) the pore through which the water leaves the body.
D) the vacuole formed for food ingestion.
E) the structure for attachment to the surface.
Correct Answer:
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Q29: Animals in phylum Nemertea are called proboscis
Q30: Which Phylum could be described as acoelomate,
Q31: Cestodes are
A) tapeworms.
B) parasites of vertebrates.
C) contain
Q32: Which of the following statements about cestodes
Q33: The phylogenetic tree of animals shows that
A)
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A) most lack nematocysts.
B) have transparent sac-like
Q36: In Platyhelminths differ from cnidarian
A) since cnidarians
Q37: In many protostomes, each embryonic cell develops
Q38: What gene family is thought to be
Q39: Based on molecular data, the Platyhelminthes are
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