How does this phenomenon illustrate Darwin's principles of evolution?

Question

How does this phenomenon illustrate Darwin's principles of evolution? Give at least three principles illustrated by this example and explain your reasoning.

Peppered moths in London changed colors over times in order to blend in with their changing environments. This is evolution in action! Answer the following questions to see if you understand how evolution worked in this case and some other very important real life situations.

Answer 1

Here is a page with exactly what you are looking for, the peppered moth is at the bottom:

http://www.uic.edu/classes/bios/bios104/mike/evolution01.htm

Answer 2

well what is the phenomenon u r talking about. that is not clear.

talking of darwin's theory, he stated that all the organisms reproduce to produce offsprings, and only the strongest and fittest of them survives as the nature only supports them and all the weak ones die. this is because there isn't enuf space in the nature to support each and every single organism.
for example, if u take a fish,it produces lots of eggs but only few of them actually happen to exist because most of them are perished as there is always a stuggle for existence.
imagine if didnt happen, all the million eggs wud hatch up into fishes, what wud u expect to be in sea, other than fishes floating all around. and where wud all these fishes get their food from, their habitat etc.
so only a few fishes survive, which are strong enough.

the peppered moths story in london goes like this:
there are two types of that moth- black and fair. they usually rest on the bark, and since the bark color is kindda light, so the fairer ones were invisible to the eyes of the predator, whereas the darker ones were easily visible, and hence their population kept on decreasing. as the industrial evolution began in london, a lot of smoke started to be produced and it started depositing on the trees, making their bark colors dark. because of this the fairer moth were now easily visible to the predator as compared to the dark ones. and since then the population of the white moths started decreasing and as darwin's theory states about the survival of the fittest, the darker forms usually had the upper hand here, so their population started increasing and the fairer forms decreased. when the industrial revolution came to an end, there was a lot cleaner atmosphere without too much smoke, there was not too much dust on the barks.so now the darker forms were prone to the predators than the lighter ones and hence again the population of the lighter forms started increasing and that of the darker ones started decreasing.

Answer 3

This is due to pollution. As the the trees became blacker the light moths stood out and were therefore eaten quicker by predators. This meant the the darker moths were free to beed and become more prevalent. The opposite happens in the countryside where lighter moths are more common.
This illustrates high speed evolution, survival of the fittest and adaptive radiation.

Answer 4

london used to have some dark moths and some light moths. the trees used to be light, so the dark moths were eaten by the birds because they contrasted with the light trees, and the light moths predominated. but then the industrial revolution blackened the trees, and the light moths contrasted with the trees. the black moths began to predominate. this shows natural selection and reproductive advantage, in that the "fittest" moths survived to reproduce. there was actually a recent finding that europeans evolved genes for lactose tolerance around the time they began domesticating cows.

Answer 5

"How does this phenomenon..."

What phenomenon? You haven't given us the example to evaluate.

Answer 6

What phenomenon?