The principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater is

Common commercial benefits of microorganisms include synthesis ofa. insulin.b. antibiotics.c. aspirin.d. antibiotics and aspirin.e. antibiotics and insulin.

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

True or false multiple lane changes must be done individually going through the same procedures for each lane change