Which of the Following Is NOT Found in at Least

question 12

Multiple Choice

Which of the following is NOT found in at least some sponges?

• A)Spicules of calcium carbonate
• B)Spicules of silica
• C)Spicules of fibrous protein
• D)Spongin,a fibrous protein Skeletal elements of sponges include calcareous and siliceous spicules and the protein,spongin.

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Definitions:

Visual Impairment

A reduction in the ability to see to a significant degree that cannot be fully corrected with glasses, contact lenses, medicine, or surgery.

Traffic Light

A signaling device positioned at road intersections, pedestrian crossings, and other locations to control the flow of traffic using a standard color code.

Ophthalmologist

A medical or osteopathic doctor specialized in eye and vision care, including diagnosis, treatment, and surgery of eye diseases.

Involuntary Motion

Movement that occurs without conscious control, often reflexive or automatic in nature.