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. If nudibranch rhinophores are located at the anterior ends of these sea slugs, then they contribute to the sea slugs' A. segmentation B. lack of torsion C. development of a head D. identity as lophotrochozoans

Nudibranchs are a group of sea slugs that have about 3000 different species.
They can be found in shallow and deep waters from the poles to the tropics. They are renowned for their stunning color patterns despite frequently barely reaching a length of two millimeters.
The Greek and Latin words for "bare gills," nudi and branch, respectively, are used to name nudibranchs. They might also have tentacles on their skulls to help with mobility, taste, and smell.
The rhinophores, a pair of tentacles on the nudibranch's head that contain scent sensors, enable it to smell its prey or other nudibranchs.

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