Cnidarians Have a Gastrovascular Cavity Rather Than a Complete Gut;

question 51

Multiple Choice

Cnidarians have a gastrovascular cavity rather than a complete gut; in what way(s) would this arrangement be less functional?

• A)A blind-ended cavity increases the probability of parasite attachment within the cavity.
• B)Gastrovascular digestion is less efficient because the more powerful digestive chemicals seen in advanced animals, like stomach acids, would be destructive with this type of organization.
• C)Lacking a mouth and the capacity for chewing greatly reduces the potential prey items available for cnidarians in comparison to other animals.
• D)Because undigestible materials must pass out through the same opening used to enter the cavity, a single item must be completely digested and expelled before digestion of a new food item can begin.

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Definitions:

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