"Only in the sense that a weakness relates to the particular enviromental pressure."
So the stronger ones would survive and weaker ones would die out?
And that would be the explanation of 'natural selection'?
I'm sorry if I'm asking what may seem to be dumb questions, but I usually can rationalize things better if I just repeat what I'm thinking.
Something to do with what my wife calls 'driving me nuts' syndrome!
I wouldn't necessarily use the word stronger though it's often implied. By my simplistic layman's definition natural selection is the sum of any and all reasons why some individuals don't live to reproduce while others reproduce prolifically in relationship to genetic heritable difference. To give an example: if your village gets attacked and all the strong and brave men and women get killed trying to defend while the cowards run hide in the forest then after the enemy is gone, the cowards continue the population gene pool. When another enemy returns several generations later you have a population that is adapted to survive by running and hiding. Chameleons, porcupines, and turtles are a few examples of different adaptations to predators. As you can see, the possibilities are endless.