Which molecule is used by cells as an energy source?

There are six elements that make up most of the human body. which of the following is not one of these six elements?

Which codon is the code for the amino acid histidine (his)?

When elements that form a mineral dissolve in hot water, they form a mixture called a(n) a)geode b)vein c)evaporation d)crystallization e)magma f)lava g)solution h)gem