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

question 3

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 spiracles and tracheae of insects 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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Machine-Hours

A unit of measure for the amount of work or operation time a machine has completed or is expected to complete.

Maintenance Cost

The expenses associated with upkeep, including repairs and preventive measures, to ensure the efficient operation of assets.

Relevant Range

The level of activity within which assumptions about variable and fixed cost behaviors are valid.