What happens to the speed of light as it exits the air and enters a glass of water? А
It slows down
B
It speeds up
С
It remains constant
D
It first slows down and then speeds up.

I believe its D

Explanation:

because why would it slow down or speed up

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.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.