An adaptation you would expect polar microbes to have would be in their membranes.

Cholesterol

An adaptation you would expect polar microbes to have would be _cholesterol_ in their membranes.

Explanation:

The cholesterol  intersperse in the  phospholipid asociated at the lipid bilayer, this allows at the membrane to keep flowing and not freezing, so the cell keeps its normal function no matter the cold that could be out side.

c

explanation:

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.