explain charles darwin's therory of evolution by natural selection?

Answer 1

1) All species will have more offspring than can survive to adulthood.
2) Every organism is unique.
3) Unique traits are heritable.

These three things lead to a struggle for existence in which the most well adapted will prevail and be able to survive and spread their genes increasing the relative frequency of the traits that led them to prevail in future generations.

Answer 2

How specific of an answer do you need? Darwin's theory of evolution is based on the fact that within any population, there is genetic variation among individuals. Some of the variation accounts for traits that have some affect on reproductive success; some don't. If a trait affects reproductive success positively, say, it helps an animal find a mate better, find more food, or fight off enemies so that it lives longer, its genes will be passed on to its offspring, and its offspring will have that trait to pass on to its later generations. Of course this isn't the entire explanation; there are other circumstances to consider. A lot of the population is subject to random selection, that is, even traits that don't affect reproductive success will get passed on by chance. "Natural selection" is deceptive in the sense that it sounds like all organisms with beneficial traits are "selected," which is not the case.

Answer 3

Natural selection hinges on several conditions:

1. Parents produce more offspring than can possibley survive.
2. The offspring have variations; they are not all alike.
3. Some individuals may have variations that allow them to survive when others do not. The survivors live long enough to reproduce.
4. The next generation will be more likely to have that particular variation.
5. After many generations, the favorable variation will be common in the population.

Answer 4

Organisms have physical characteristics that put them in advantage of their species because they have a feature which allows them to exist better than the rest
this might be in getting food , getting mates or escaping predators
If you can do it better you last longer and can pass on your genes more

Answer 5

'only the fittest will survive' in life the ones who survive are the ones who can adapt. they need ways to live that are appropriate for the climate ect.