What holds the nitrogen bases together in the DNA molecule? OCovalent bonds
O hydrogen bonds
O phosphate bonds
O oxygen bonds

This fossil evidence provides support for the idea that (a) modern organisms have evolved from earlier species.

Explanation:

Fossil Evidence: Fossils are evidence or clues that have been left behind by living things and are found by archaeologists. They are tools that are helpful for understanding the diverse groups of organisms that have lived in our planet at one time or another.

we define fossil as any preserved evidence of an organism.