explain charles darwin's theory of evolution through the process of natural selection?

Answer 1

Basically it says "survival of the fittest", meaning the lifeforms with the best adaptations are more likely to survive.

For example, let's say that two deer are born. One has a gene which allows it to eat bark from a tree (like say because of stronger teeth), the other one doesn't have that. During winter, the only available food is treebark, which one of them can eat, and the other one can't. As a result, the one that can't is probably going to die, while the one that can eat bark will more likely survive, and pass its genes on to the next generation.

That's basically what it is, although it's a lot more complicated than the example I used here. But it should give you a rough idea of what the theory of evolution is.

Answer 2

In simple terms - all animals are just a little bit different. Sometimes, the difference can give one animal an edge over his fellows in finding sustenance - shelter - safety - sex (the big four esses). That animal will have more babies that his fellows, and those babies will have the difference just like himself, and those babies will have more babies, and pretty soon the "difference" is the "norm" ...
High stress, and tough competition, speed the process of evolution by making the consequences of failure both more likely and more severe. In other words, failure is not an option, at least if one hopes to pass one's genes on to the next generation. Savvy?
As a side note, human society and technology have largely removed evolutionary pressure from our species. Don't expect any changes in brainpower, or phsyical characteristics, to occur among us apes, until and unless there is a calamity that puts real pressure on our species survival.
What that means is that dummies, uggos, wimps, blind, deaf, little, twisted and all the other variants of homo sapiens (which we have some notion of categorizing in to "better" or "worse") - pretty much all humans have a fair to middling chance of reproducing.
Cheers.

Answer 3

Evolution - A theory first proposed in the nineteenth century by Charles Darwin, according to which the Earth's species have changed and diversified through time under the influence of natural selection. Life on Earth is thought to have evolved in three stages. First came chemical evolution, in which organic molecules were formed. This was followed by the development of single cells capable of reproducing themselves. This stage led to the development of complex organisms capable of sexual reproduction.

Natural selection occurs when individuals differ in reproductive output for functional reasons, i.e., when differences in reproduction follow from the fact that individuals differ from each other in their ability to tackle the challenges posed by their internal biology and by the biological and physical environment. This ability is a function of the physical structures (traits) of life forms and of how these structures affect their ability to tackle the aforementioned challenges.

Natural selection results in adaptive evolution when traits that enhance organismic abilities and thus the reproductive output of individuals that display them, are heritable. Such traits are expected to become more frequent over the generations.

Answer 4

You can't explain fact as theory. Once it's been proven as fact it's no longer considered theory.

Try re-phrasing your question.

Answer 5

I am NOT going to do your homework for you.

~@shley