Nitrogen fixation a. is the process where nitrogen is converted to a usable form b. is accomplished by plants when they break down soil c. occurs as a result of photosynthesis d. none of the above

a. is the process where nitrogen is converted to a usable form

Explanation:

Nitrogen fixation is a process by which the soil bacteria converts the atmospheric forms of nitrogen such as nitrates, nitrites and ammonia so that these forms can be easily absorbed by the plants and utilized for their growth and development. These forms of nitrogen are used by the plants for the synthesis of proteins which are necessary for cellular metabolism and growth.

multiply it by 5 in order for you to understand i cant give an exact answer.

characteristics of hydrocarbons