What is the only force acting upon an object in free fall

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

49 ! how are energy cycles and growth cycles related?