Some of the water that falls as rain evaporates back into the atmosphere. What happens to the water molecules during this process?

The water molecules separate into oxygen and hydrogen molecules which allows them to transfer back up into the atmosphere in their individual state.

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides