Which of the following could be a nucleotide of dna?

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Quick asap will give brainiest ! what best describes the same pattern of tides on earth throughout the day? neap tides spring tides semidiurnal tides nocturnal tides