The minute,needle-like structures that act as a skeletal support system in sponges are called _________________.
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Q29: The water outlet in sponges is known
Q30: In most sponges,the free-swimming larva produced by
Q31: Why are bath sponges so soft?
A)Silica is
Q32: The tough protein fibers sometimes found in
Q33: The largest impact that the loss of
Q35: Placozoans feed by
A)sharing food produced by symbiotic
Q36: The flagellated cells embedded in the mesohyl
Q37: Which of the following is NOT found
Q38: Reproduction in at least some sponges is
A)asexual
Q39: Placozoans
A)are flat,plate-like animals with no symmetry.
B)are probably
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