Answer:
O C. The population's growth rate is increasing exponentially
Answer:
they give the lungs a really big surface area. they have moist, thin walls (just one cell thick) they have a lot of tiny blood vessels called capillaries.
The walls of the alveoli are only one cell thick. This makes the exchange surface very thin - shortening the diffusion distance across which gases have to move. Each alveolus is surrounded by blood capillaries which ensure a good blood supply.Adaptations of the alveoli:
Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through.
Explanation:
Have great day
Answer:
<u>Cells begin</u><u> </u><u>dividing rapidly</u>
A typical example is environment science. Environmental science is a field that deals with the study of interaction between human systems and natural systems. Natural systems involve the earth itself and life. ... Sciences used in environmental science include geography, zoology, physics, ecology, oceanology, and geology.
