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

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.