What structure regulates the amount of light passing to the visual receptors of the eye?
a. irisb. corneac. lensd. aqueous humor

a. iris

Explanation:

iris is actually the structure of the eye that regulates the amount of light passing to the visual receptors of the eye

the wires in the toaster turning red and the toast crisping and turning brown

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs