The Galapagos Islands are home to variations of tortoises. The shapes of their shells are the most noticeable variation. The tortoise population on Isabela Island exhibits mostly dome shaped shells, but Hood Island has a large population of tortoises with the saddleback shells. A shell that is a hybrid between the dome and saddleback shells is exhibited on Pinta Island WHAT MIGHT BE SOME EXPLANATIONS FOR THE VARIATION IN SHELL?

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.

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.

its probably to later but whats the question