Which gestational period is dominated by the development of organs and organ systems? which gestational period is dominated by the development of organs and organ systems? first trimester third trimester second trimester postnatal development?

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b.a light particle

Deserts (especially true deserts) are not easy places for animals to live. animals who live in them often have special features that them survive. which adaptation would be for this group of animals? a) keen eye sight b) short, narrow legs c) tolerate heat d) webbed feet