Most likely the outside atoms that are arranged around the central atom. but you didn't really give any answers. so thats my best guess.
High concentration to low is called diffusion
Bright flowers because that would attract insects to land and gather nectar and the pollen gets on them and travels to other flowers<span />
All three of the phosphate groups have a negative charge and since they are all connected to each other by a carbon chain, they have more energy because they repel each other. When you take away one phosphate group, energy is released because the negative charge between those two is released.
