Photosynthesis is: a. a physical law, which states that when energy is converted from one form to another, some of it is degraded into heat, a less usable form that disperses into the environment. b. the biological process that captures light energy and transforms it into the chemical energy of organic molecules, which are manufactured from carbon dioxide and water. c. the measure of the amount of usable energy available to do work in the universe. d. the process that involves potential energy being converted to kinetic energy.

The answer is B. The biological process that captures light energy and transforms it into the chemical energy of organic molecules, which are manufactured from carbon dioxide and water.

Explanation:

Photosynthesis is a process where plants capture and process the photons of sunlight and lead them to a photosystem where they excite the cell and start a series of process that will end with obtaining organic molecules for energy purposes. Within this process, water and carbon dioxide are used to produce glucose and oxygen.  

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many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.