Which term describes the adaptation of cells organs or organ system for a specific function?

Me with these questions if you’re it sure don’t answer

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

Plz ! what does it mean for an allele to be dominant?