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 feet of certain insects, notably of female butterflies, have a function most similar to that of
A) rhinophores.
B) dorsal plummules.
C) cerata.
D) more than one of these.

Question

Quizplus · Accepted Answer

The function of rhinophores is to detect chemical cues in the environment, and the feet of female butterflies have a similar function by detecting chemicals in plants that they use to lay their eggs on. Dorsal plummules are respiratory structures specific to sea slugs, and cerata contain nematocysts used in defense and prey capture, which are not analogous to the function of butterfly feet.

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