Which of the following is likely to be researched by an environmental scientist? a. the effect of oil spills on marine animals b. the anatomy of a platypus c. the chemical composition of a compound d. the velocity of a cheetah select the best answer from the choices provided a b c d

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.