In terms of the transduction of physical energy into coded neural messages, the is to the eye as the is to the ear.

The retina, Cochlea.

Explanation:

Transduction in the nervous system refers to a process where by a stimulus is converted to electrical signal by receptor cell which is transmitted to the along the axon to a part of the brain to be processed and integrated.

The retinal is to the eye. The retina is the light sensitive part , that lies at the back of the eye. It receives light, convert it to neural signals and send the signal to the brain for interpretation.

The cochlea is the ear.

The cochlea is the hollow bone found in the inner ear which transfer sound waves into nerve impulses.

Chemical energy is stored in ATP, and NADPH is transferred to 3-PGA to form the high energy molecule glyceraldehyde 3-phosphate (G3P). G3P is used to make sugar.