DNA, with only 4 nucleotides repeating along a sugar-phosphate backbone, could account for the diversity of life because- A) It was a code, and it was very long.
B) it was surrounded by complex proteins in chromosomes.
C) life isn't really that diverse.
D) it is still a mystery.

Which of the following claims does the author support the least

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?