The asconoid sponges have the simplest type of canal system.
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Q4: The flagellated cells embedded in the mesoglea
Q5: The most complex body organization,and the one
Q6: In sponges,respiration and excretion of various molecules
Q7: Gemmules are an adaptation of freshwater sponges
Q9: Many of the more complex groups of
Q10: The demosponges
A)constitute only a small number of
Q11: Almost all sponges are marine animals.
Q12: The majority of sponges are colonial,and most
Q13: The analogous equivalent of "connective tissue" in
Q34: The minute,needle-like structures that act as a
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