What is meant by 'natural selection'?

Answer 1

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

All populations of organisms vary, more are reproduced than can survive on the resources the immediate environment provides, some have the variant traits needed to survive and reproduce more successfully than conspecifics against the immediate environment and these individuals are said to be naturally selected.

Answer 2

Short version;

Natural selection is the process by which heritable traits that make it more likely for an organism to survive and successfully reproduce become more common in a population over successive generations.

It is a key mechanism of evolution.

Answer 3

Natural selection means that specific traits of an organism become gradually more common down the line, while the less favourable become less common due to the different production of a genotype.

Answer 4

Actually, "survival of the fittest" means the most fit for the environment, not the most strong. If an animal is born with a slight 'defect' that actually makes it able to tolerate its environmental conditions in a better way, then that animal's genes become part of the surviving gene-pool. Other individuals may be stronger but less suitable (fit) for survival in that environment, and therefore 'Nature' selects according to her needs.

Answer 5

The differential reproductive success of some variants over other variants.

As an example, take two siblings born from the same parent(s). Each sibling (provided they're not identical twins), has slightly different characteristics. Some of these differences may allow one of the siblings to better cope with prevailing circumstances than the other. As a result, one of the siblings has a greater chance of producing fertile offspring than the other. This means that in the next generation, more individuals would carry the genes of this sibling than the genes of the other. And that's what's called 'natural selection'.

Answer 6

Natural Selection is the process when organisms better adapted to their environment tend to survive and produce more offspring. You were an accident

Answer 7

Evolutionary change based on the different reproductive success of individuals within a species

Answer 8

Natural selection is simply nature taking its course. It's when two organisms have an offspring the natural way and not having scientists involved. That's the simple way to put it.

Answer 9

natural selection means a process by which individuals that are better adapted to their enviroment are most likely to survive and reproduce than other of the some species.

Answer 10

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