One reason common names are not useful to biologists is that they

a)require the use of a dichotomous key

b)are too long

c)can apply to more than one animal

d)are in latin

The reason Common names are not useful to Biologists is that they can apply to more than one animal.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.