If you are located at 35 north latitude, you will experience a situation where the sun is directly overhead (at 90 degrees) twice a year.

A hot object such as the sun releases a greater amount of energy that is concentrated along the short end of the electromagnetic spectrum.

Alpha motor neurons form connections with muscle fibers at the _____.

The _________ is the layer of the atmosphere where weather events occur.

Animals in cold climates have typically have _____.

Approximately h ow many ganglion cells does the human eye have?

Age-related loss in muscle mass appears to begin around the age of _________.

ADH or vasopressin controls the retention of fluid, while aldosterone controls the retention of sodium.

A Z line is _____.

Alternative versions of a particular gene are known as _____.