Which is not a system that is essential to the success of all green plants

Use this diagram of an animal cell to answer the question. where does the first stage of cellular respiration occur? w x y z

Which of the following examples can cause gene flow between populations? a. an increase in predators to a population of zebra b. a volcanic eruption that kills half of a population of mice c. bird droppings that contain seeds from a different location d. a person that sprays a toxin on a group of mosquitoes

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.