Actinobacteria sp. are fermenting organisms (which do not 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?

1 digestive system

2 stomach

3 bladder

4 carbon deoxide

5 tiger

amber has allowed scientists to study dna that has been preserved over millions of years.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".