Please help me! This a timed assignment I have 19 mins left.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

What are the seven economic and social goals?

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.