Its according to their organs.. where the my come from.. where they inhabit..what the eat.. how they look like..
take for example: reptiles.. they are classified as reptiles cause.. they are the only types of animals who have hard scaled skin not like fish..
Answer:
Actually, Adenosine triphosphate (ATP) is a small molecule that acts as a coenzyme within a cell. The main role of ATP is to provide energy. ... 4) Energy released is used for metabolism in the cell. Other reactions that require energy from ATP include; active transport/ muscle contraction/ glycolysis.
Explanation:
nucleic acid
DNA RNA
double chain single chain
deoxyribose ribose
ACGT ACGU
Nucleus Cytoplasm
No yes
mRNA, rRNA, tRNA
that's how you put it in the diagram