What law of motion corresponds with the following statement? "a bird pushes down on the air with its wings in order to fly"-first law-second law-third law?

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?