Which is most directly responsible for building up a river delta?

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?

A(n) is a molecule influences the way that a molecule reacts.

Which describes the habitat of a frog?