Which ocean current determines weather changes? circulation occurs due to the difference in the temperatures, densities, and salinities of the waters, and determines climate changes.

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry