the chromatography one was that the pigment couldn't be submerged in the solvent idk. but the gruop 3 one was that it had a small amount of glucose. identify gene-remove gene-insert into bacterium-extract enzyme. the aids one i put that it destroys something something that helps fight invading...
I chose 2; that was definitely the answer; it said something like they adapted to their different environments, which caused the changes. The first one said it was b/c of preferring dessert/arctic=] Oh, and Kate, I chose that too b/c the environment causes variation; none of the other answers...