What's natural selection?

Answer 1

Selection of organisms for survival and reproduction to produce offspring, which is not artificial.
Selection by Nature on the basis of fitness and ability to reproduce.
The theory of Natural Selection was given by Charles Darwin.
It states that:
Organisms have great power to reproduce
No two individuals are alike ,that is, variation is the rule of nature.
Overproduction leads to competition for food and shelter.
This leads to struggle for existence.
This in turn leads to death of unfit and survival of the fittest.
The fittest ones survive on the basis of advantageous variations and reproduce. This cycle goes on and advantageous variations get accumulated to finally lead to the formation of new species from the existing ones.

Answer 2

Natural selection is one of the tools for evolution. Natural selection will act upon a population inorder to adapt to their environment. The main factors for natural selection is genes, and its reaction to the environment, which will bring heritability. The population needs to have a large group of the effective population which are individuals capable of reproductive success. The more genes that can be passed on to the next generation will allow great genetic variation to be displayed in the population. Natural selection will act upon certain genes to produce a certain phenotype for adaption with the environment. There cannot be variation within the population size and heterzygosity must be present. It means that there has to be different alleles within the loci or gene. Homozygosity will not allow natural selection to act. This is important for neutral and adaptive genes in the population.

Answer 3

natural selection coincides with the idea survival of the fittest. natural selection is not necessarily evolution. Darwin spoke about finches on the Galapagos islands. during the seasons in which large seeds were grew, finches with smaller beaks were unable to eat the seeds and survive, therefore the finches with bigger beaks survived in much greater numbers due to their ability to crack open and eat the seeds. in the seasons with smaller seeds, birds with big beaks were unable to pick up and eat the small seeds and began to die off while small beaked birds survived due to their ability to pick up and eat the small seeds that would fall into tight spots. natural selection is evident here because nature(natural) selected which species would live on due to their ability to get food and not starve.

Answer 4

natural selection is when, rather than humans picking what survives based on its characteristics, nature decides. animals with the best characteristics for the situation survive. for example, animals that have developed camouflage survived while others were eaten by predators. they then passed on this trait to their offspring making it a characteristic of the species.

Answer 5

Natural selection in its simplest form is "survival of the fittest". The most adaptive forms of life will survive, the rest will not. If that form of life is faster, stronger, smarter and more agile it will survive. The weaker will not.

Answer 6

selected by nature to adapt to that environment

Answer 7

reproductive propagation of organisms with traits that are not unfavorable for survival.

It is not, as so often said "survival of the fittest." Sometimes fairly unfit organisms survive and reproduce because they are still capable of living in their environment. Organisms with unfavorable traits tend to die out.