The presence and relative importance of one type of visual stimulus or another can be influenced by environmental conditions. For example, some species of shark possess conspicuous markings on their pectoral fins that enhance the visibility of a particular postural display. These species usually live
A) deep below the surface of the water.
B) in clear water habitats.
C) in large groups.
D) in water containing a lot of sedimentary material.

Question

Quizplus · Accepted Answer

Sharks with conspicuous markings on their pectoral fins to enhance visibility of their postural displays typically live in clear water habitats, where such visual signals can be easily seen and interpreted by other animals. In murky or sediment-rich waters, or in the deep ocean where light is scarce, visual signals would not be as effective.

The Presence and Relative Importance of One Type of Visual