There is a "break" in the dark adaptation curve at about 8 minutes.This occurs because:
A)the rods and cones adapt at different rates
B)the pupil begins increasing in size again at that time
C)the optic chiasm begins to close
D)the last two cone photopigments begin to regenerate rapidly

Question

Quizplus · Accepted Answer

The "break" in the dark adaptation curve occurs because the rods and cones adapt at different rates. The cones adapt quickly and are responsible for initial dark adaptation, whereas the rods adapt more slowly and take over as light levels continue to decrease. The break at around 8 minutes marks the point where the cones have adapted as much as they can and the rods begin to take over.

There Is a "Break" in the Dark Adaptation Curve at About