Which type of transport requires energy to move a molecule?
O
A. Osmosis
O
B. Active transport
O
C. Passive transport
O
D. Diffusion

Dwarf galaxies are select one: a. relatively rare. b. not very bright c. mostly spiral shaped. d. none of these.

What would be the most likely result if the ph of the stomach were increased to 5

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons