What is likely to happen to coral reefs if carbon dioxide emissions are reduced and atmospheric carbon dioxide concentrations are successfully controlled? What will be the consequences for the biosphere?

your spelling is a little off : ]

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.

i believe the answer is snake.