Nudibranchs, a Type of Predatory Sea Slug, Can Have Various

question 50

Multiple Choice

Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips.
-The small, thin extensions of the skin on the aboral surfaces of sea stars have a function most similar to that of

• A) rhinophores.
• B) dorsal plummules.
• C) cerata.
• D) more than one of these.

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Definitions:

Volume

The quantity of three-dimensional space enclosed by a closed surface or the space that a substance (solid, liquid, gas, or plasma) occupies.

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A unit of volume in the metric system, equivalent to one thousandth of a liter.

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A unit of length in the metric system equal to one hundredth of a meter, commonly used to measure small distances.