1. The correct answer is: cell recognition protein
2. The correct answer is: The nonpolar tails are repelled by water, so they position themselves in the middle of the bilayer. The polar heads are attracted to water, so they point outward.
3. TRUE is As cell size decreases, the surface area-to-volume ratio increases.
4. The correct answer is: have no nucleus
have no membrane-bound organelles
Of course-true- without variation evolution would not existd
It has to be a , T cells are are your killer cells
