A protein binding site contains a pocket lined with several amino acids that have nonpolar side chains. Assuming a good spatial fit, which kinds of functional groups are best suited for placement in this pocket in order to enhance the binding of a ligand?

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process. 

Hey .a. is the correct option

Below 0 would be the most difficult