Why does secondary succession happen more frequently than primary succession?

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

Which muscle is responsible for inhalation ?

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