Defy the following words and use them in a sentence. Spasm

Cramp

Erection

Migraine

there's the proffessional site that will you.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

wegner's theory did not explain how the continents could move

explanation:

d. organisms have cells with different shapes and functions.