Answer:
air
Explanation:
Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.
The form of natural selection is called adaptive radiation
I think its A but I'm not sure.
Answer:
In a nucleotide the base is attached to the first carbon in the sugar. Nucleotides are made of three parts, a sugar molecule, a phosphate and a base.