Protons in a chloroplast flow through an atp synthase from the

What is one function of the embedded proteins

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Why do we perceive objects as retaining their brightness under different lighting levels?