Dna nucleotides are made up of
a. a sugar group, an amino acid group and a nitrogenous base.
b. a phosphate group, a sugar group and a nitrogenous base.
c. a protein group, a sugar group and a nitrogenous base.
d. a phosphate group, a starch group and a nitrogenous base.

Ibelieve its b but u might have to

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on