what are four points of natural selection?

Answer 1

!. No two individuals are alike. Variation is the rule.
2. Power of reproduction is great. Fecundity.
3.Struggle for( food and shelter) existence as a result of overproduction.
4. Survival of the fittest on the basis of advantageous variations.

Answer 2

Darwin's theory of natural selection (which is part of his larger Theory of Evolution) is a series of 5 Observations and 3 Inferences.
Observation 1-- Organisms havea great potential fertility
Observation 2-- Natural populations normally remain constant in size, except for minor fluctuations
Observation 3-- Natural resources of limited
------Inference 1-- A continuing struggle for exitence occurs among members of a population
Observation 4-- All organisms show variation
Observation 5-- Variation is heritable
------Inference 2-- Differential survival and reproduction occur among varying organisms in a population
------Inference 3-- Over many generations, differential survival and reproduction generate new adaptations and new species

So there's really 5 main things but if you want four:
Variation
Competition
Fitness
Adaptation

Answer 3

1. Organisms have changed over time, and the ones living today are different from those that lived in the past.
2. All organisms are derived from common ancestors by a process of branching. Over time, populations split into different species, which are related because they are descended from a common ancestor. Thus, if one goes far enough back in time, any pair of organisms has a common ancestor. This explained the similarities of organisms that were classified together -- they were similar because of shared traits inherited from their common ancestor. It also explained why similar species tended to occur in the same geographic region.
3. Change is gradual and slow, taking place over a long time. This was supported by the fossil record, and was consistent with the fact that no naturalist had observed the sudden appearance of a new species. [This is now contested by a view of episodes of rapid change and long periods of stasis, known as punctuated equilibrium].
4. The mechanism of evolutionary change was natural selection.

Answer 4

1. Natural selection does NOT cause genetic changes in individuals
2. Natural selection befalls individuals, but occurs in populations
3. Evolution is a change in allele frequency
4. Evolutionary changes are not "good" or "progressive" necessarily

Answer 5

Well, basically it will occur if you have heritable variation in a population with varying survival rates over time.

Answer 6

Well, simply pick any four you want.

Make a point of picking those four.

You then have four points.

Did none of you people go to school?

Answer 7

Are you talking about evolution?