A) one-way flow cycles.
B) biogeochemical cycles.
C) decomposer-detrital cycles.
D) energy cycles.

A) plant biomass is a storage pool of carbon.
B) plant gross primary production is stored as carbon on Earth's surface, taking carbon out of the atmosphere.
C) plant carbon is effectively recycled through biodegradation by organisms, leaving little to no residue.
D) plant net primary production is stored as carbon on Earth's surface, taking carbon out of the atmosphere.
E) plants are the base of all ecological food chains.

A) decomposition.
B) nitrification.
C) denitrification.
D) assimilation.
E) fixation.