How do fossils and fossil record support the idea that life changes over time

explain why the pattern of differences that exists from earlier to later fossils in the fossil record supports the idea that evolution has taken place on earth. later fossils are more similar to modern organisms than earlier fossils, this suggests that change has occurred overtime.

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.