Question

1. which of the following best describes the nitrogen cycle? a. the movement of carbon between organisms and the atmosphere b. the conversion of nitrogen gas into forms usable by plants c. the process of water moving through the atmosphere d. the breakdown of rocks into soil particles

Explanation:

The nitrogen - cycle involves the conversion of nitrogen gas in the atmosphere into forms that can be used by plants, such as nitrates and ammonia. This is done through processes like nitrogen - fixation by bacteria. Option b correctly describes this key aspect of the nitrogen cycle. Option a describes the carbon - cycle, option c describes the water - cycle, and option d describes weathering.

Answer:

b. The conversion of nitrogen gas into forms usable by plants