The order in which a drop of ink would pass by the structures in an ascon sponge is
A) spongocoel-ostia-osculum.
B) osculum-spongocoel-ostia.
C) osculum-ostia-spongocoel.
D) ostia-spongocoel-osculum.
E) ostia-osculum-spongocoel.The pathway for water moving through the simplest sponge body form is ostia-spongocoel-osculum.In sycon sponges incurrent and radial canals are present.In leucon sponges the spongocoel is often absent.
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Q13: Which one of the following statements regarding
Q14: The extracellular matrix found in sponges is
A)spongin.
B)collagen.
C)pinacoderm.
D)mesohyl
Q15: Specialized archaeocytes that secrete spicules are
A)collencytes.
B)sclerocytes.
C)choanocytes.
D)spongocytes.
E)lophocytes.Archaeocytes may
Q16: A sponge feeds by
A)using a net and
Q17: The simplest of canal systems is found
Q19: Concerning producing larger organisms without cellular differentiation,
A)nature
Q20: Which statement about adult sponges is false?
A)Their
Q21: Which of the following statements about sponges
Q22: If a sponge is fragmented and cells
Q23: Out of all metazoans,members of _ have
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