With regard to light perception:
a. the fovea contains only cones
b. the cones have a lower threshold to light than rods
c. rods respond most to the red-yellow end of light
d. rods respond most to wavelengths of about 500nm
a. the fovea contains only cones
b. the cones have a lower threshold to light than rods
c. rods respond most to the red-yellow end of light
d. rods respond most to wavelengths of about 500nm