Why is sweat a good coolant for the body?

a. the arterioles that transfer water to sweat move closer to the skin surface when it is hot.

b. breaking h bonds between water molecules in sweat requires energy from body heat.

c. sweat contains minerals such as sodium chloride.

d. sweat is non-polar?

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.