(Q).
Q: What in mammalian lungs, increases the surface area for gas exchange? Choices: - bronchi - thorax - bronchioles - alveoli A:
(A).
alveoli

(Q).
Q: What branch of science deals with the effects people have on the environment? Choices: - physical science - cultural science - ecological science - environmental science A:
(A).
environmental science

(Q).
Q: What are convection currents that occur far below the surface of the ocean called? Choices: - subsequent currents - waves - flat currents - deep currents A:
(A).
deep currents