How does evolution of resistance to a pesticide illustrate natural selection?

Question

does not need to be long an complicated it can be but i am looking for a correct answer i do not care about length... thanks in advance

Answer 1

Survival of the fittest.

An organism adapts to threats or changes, while many others die off from such chemical combinations.

This is natural selection on a larger scale than with things such as viruses or bacteria.

Life exists on scales of size. DNA, Molecular, cellular etc..

Answer 2

The individual members of a population which exploit the characteristic of being resistant to said pesticide will survive to reproduce whereas the others will not.

Answer 3

In a diverse population, individuals respond to a catastrophe differently. Even if a pesticide killed 99% of the population, the 1% that survived will reproduce and rebuild the population. That is exactly how natural selection works.

Answer 4

Because in any population there will be a group of individuals that have the genetic material to survive the pesticide.  The ones that don't will die and the ones that live will survive to reproduce.  So by natural selection you now have a population that a pesticide doesn't work on anymore.

Answer 5

Well lets say there are 10 bugs.  A farmer comes along and sprays the bugs with a pesticide.  Only 8 bugs die, and the other 2 go on to reproduce.

These two bugs have 10 kids together, and when the farmer tries the pesticide again, none of them die.

Why does this happen?  Well the parents were resistant to the spray, and they passed that trait on to their offspring, resulting in bugs that wouldn't be killed that easy.

Hope you understand the concept.