Question

The term "cycle" is used in nutrient cycles because
A. They have two parts like the two wheels of a "bicycle".
B. Their steps always form a long ring, like a snake biting its tail.
C. The nutrients always get cycled and recycled through the many paths of the system.
D. The nutrients that we consume are lost in space.

Answer 1

Answer:

A nutrient cycle (or ecological recycling) is the movement and exchange of organic and inorganic matter back into the production of matter. Energy flow is a unidirectional and noncyclic pathway, whereas the movement of mineral nutrients is cyclic.