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Nudibranchs, a type of predatory sea slug, can have various protuberances (that is, extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plumules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips.
The spiracles and tracheae of insects have a function most similar to that of ________.
A) rhinophores
B) dorsal plumules
C) cerata
D) chemoreceptors

Question

Quizplus · Accepted Answer

Just like the dorsal plumules on the nudibranchs, spiracles and tracheae in insects perform respiratory gas exchange. Rhinophores bear chemoreceptors, cerata contain nematocysts, which are different from the functions of spiracles and tracheae.

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