Red algae are found in relatively deep water. In order for light to penetrate to these depths, it must be high in energy. Which wavelengths of light would you expect red algae to use?
A) red
B) yellow
C) green
D) blue

Question

Quizplus · Accepted Answer

Blue light has the highest energy and is able to penetrate deeper into water than other wavelengths of visible light. Therefore, it is likely that red algae would use blue light for photosynthesis.

Red Algae Are Found in Relatively Deep Water