The light moths blended in with the light-colored trees and when the Industrial Revolution changed the tree colors They would be eaten by birds more and more, while the rare dark colored moths blended in better on the darker trees. This made the dark colored moths have a higher survival rate.
Hope that helps
Answer:
the Gene's make up every distinct feature about a creature like its hair color its ear size its tail size its teeth and especially its gender
I may be wrong but, I would say the variable is the color of the light. At least that is what it sounds like to me.
An isotonic solution is when two solutions, separated by a semipermeable membrane, have equal concentrations of solutes and water. Imagine you're at a party and there are an equal number of guests in the living room and in the kitchen. It doesn't make much of a difference where you stand because you are equally as comfortable in either room. You have just as much space, you can move just as easily, and you have equal access to food. You don't spend a lot of energy trying to get out of one room or into another. This party is like an isotonic solution; everything is equal from room to room.