Which type of reaction happens when negative ions from an acid and positive ions from a base combine to form a salt?

A) neutralization

B) combustion

C) acidification

D) decomposition

the areas around the equator

the answers are a and c

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.