Describe, in detail, using terms learned during osmosis (hypertonic, isotonic, hypotonic), what would happen to a red blood cell if you drank excessive amounts of water. What would happen if your friend drank no water and a lot of salty foods?

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.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.