The Demosponges

question 6

Multiple Choice

The demosponges

• A)constitute only a small number of species.
• B)are mostly marine but include the freshwater sponges.
• C)have the asconoid-type canal system.
• D)are referred to as calcium or chalk sponges.
• E)form the most beautiful glass spicule patterns.Members of the class Demospongia are the most common sponges.Most are large,leuconoid sponges.

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