Natural selection is more of an evolutionary factor than a stabilizing factor, but one could argue that the end result of evolution is an organism that is perfectly adapted to its ecological niche, in which case stability will result.

Natural selection is the most powerful driver of evolution and it is the only mechanism of evolution ( genetic drift and gene flow are two other mechanisms ) that leads to adaptive change.

Natural selection is the nonrandom survival and reproductive success of of randomly varying organisms.

Evolution is the change in allele frequency over time in a population of organisms.

because all living organisms are born with genes that make them unique. They are passed down by our parents. when a disease or predator comes into an environment, only the creatures with the gene to survive or live through the 'disaster or problem.' this is usually called survival of the fittest due to only the best or 'fittest' are able to survive. Then the creature that survived has off spring that in turn get that gene and allows for the offspring to survive as well. this alters the species and usually considered a mutation. Like humans used to have webbed feet, but the first human or ape that lost the webbed feet was able to survive and thus continued the mutation until today it is accepted as normal versus our original webbed feet. Because those best equipped to "survive" prosper. They were the "most fit" to endure and prosper in their particular environment. It is described as the survival of the fittest is because the more an animal is fit for his or her environment the better chances it has of survival. If the animal is fit it will be able to catch his or her prey and if not he or she will die of starvation.

Natural selection has no "sub-processes". It is a continuous process that happens under particular circumstances.

The process of speciation is a related process, by which genetically distinct populations evolve from a common ancestor.

Comparative embroyology allows us to see the similarities between embryo's of related species. Therefore, similarities between two organism's in the embryo signal that at some point, those two organism's were related. The earlier those similarities disappear, the farther apart evolutionarily the two organisms are.

They both involve the principle of differential reproductive success. Only in one case, the reproductive success is determined by mindless congruence between phenotypic attributes and the environment, and in the other case, humans make the determination what traits should propagate.

The ancient Greeks already had noticed that it's what goes on but Darwin was the first to write down his ideas into a surviving book, with a lot of detailed observations.

You are a bird hunting moths (both dark and light) that live on trees. As you capture the moths most easily visible against the tree surface.

The Neo-Darwinian theory includes knowledge of Mendelian and modern molecular genetics. It is, in essence, still the same theory, but refined, expanded to include new understanding.

The individual, or the genes of the individual.

All organisms are variants in phenotype and behavior. So, natural selection is the immediate environment these organisms are in and those that survive and reproduce better in this environment leave more descendants which carry the genes that promoted that survival and reproduction advantage. Then those genes are more represented in the populations gene pool and this is evolution.

Adaptation are the physical or the behavioral traits that make an organism better fits to its environment while the Variation usually comes from random mutations. Mutations are iniatially cause by a new heritable traits.

The presence of predators

Limited food-APEX

Natural selection is one of the 'guiding' principles of evolution.

1) A dominant male (alpha-male) takes whatever female he desires, while inferior males in the group can't choose, such is common among apes.

2) Two creatures exist in one environment, but a drought comes. Only the creature that can live through the drought survives.

There are plenty more examples, but this should give you an idea of what natural selection is.

There are two questions here; but if we look at the first one (how the eye evolved), the second one will also be answered. The simplest "eye" is simply light sensitivity. For example, some simple sea organisms can only distinguish between light and dark; if it's dark they shrink - some cells on their bodies are light sensitive and it triggers the response. It's obviously basic but better than no sensitivity to light at all. The next stage is a light sensitivity with some indication of motion; again some sea organisms have just that - some extra processing indicating which cells "see" the dark area first. Again, this is better than simply having light or dark sensitivity. One can see from this, that its possible to imagine lots of "next steps" - speed as well as direction, different directions, two eyes to be able to estimate direction, layers of transparent cells to form lenses in front of the light sensitive areas and so on. What's surprising is that examples can be found of most of the "intermediate" stages. A key point is that there's no "final" target that evolution is aiming for; the next stage is reached because the offspring that have more of the next stage present will tend to survive to reproduce and eventually a new species will arise that all have the next stage. Because modern eyes are essentially the result of millions of minor improvements of earlier models we've ended up with some odd results; in our own eye the retina is essentially back to front; the nerves which lead off to the visual context are in front of the light sensitive cones and rods - also if we wanted to design an eye, we wouldn't have a blind spot where the optic nerve joins the eyeball. The "why did the eye evolve" part of the question is that each step provides an advantage over not doing it.

Natural selection can help creatures adapt to their enviorment. Sometimes this can cause unwanted problems.

It shows natural selection by showing how different birds have adapted over time to continue living, and the birds which didn't adapt, went extinct.

Differential reproductive success of variant replicators.

Natural selection varies the death rates of individuals in the current generation.

As the next generation is born with different traits derived from parents that were survivors of the current generation, the population changes gradually from generation to generation better able to survive longer against the natural selection pressures.

Should selection pressures change in the future (and they very likely will) the direction of changes caused by natural selection will also change (with a corresponding but temporary increase in death rates if the change is large and sudden).

Natural selection leads to evolution by giving the organism that is best suited for the area to thrive. Thus those who not suited for the area die off and evolution moves forward.

Evolution occurs via natural selection when certain traits become more favorable in a population over time. This is typically due to the environment or natural selection pressures in the population. Natural selection works by favoring individuals with traits that are better suited to the environment while those with less favorable traits may die off or be less likely to reproduce. Over time these favored traits become more common while unfavorable traits become less common. This process eventually leads to evolution as the population changes to adapt to its environment.

The three main components of natural selection are:

• Variation: Individuals within a population have different traits
• Inheritance: Traits are passed from generation to generation
• Differential Reproduction: Traits that are more favorable are more likely to be passed on

Natural selection is an ongoing process as the environment is constantly changing and influencing the traits of the population. It is important to note that natural selection is not a directed process and does not necessarily lead to a specific outcome. The result of natural selection is determined by the environment and the traits that are favored in the population.