Evolution is what happens when organisms reproduce with variation of traits, and those variant traits are inherited by further offspring. It is the observed effect of the differential reproductive success of variants. Therefore, in order to have evolution, one single condition needs to be met: that autonomous replicators exist that reproduce with variation. The question therefore becomes: where did life originate from?

when there is competition

Environmental pressure. Amongst a certain population of a certain species, there will be many different mutations which developed and were passed on evenly due to neither being beneficial nor detrimental.

Any change to their habitat can be considered an environmental pressure. A drop in temperature, invasion of a competing species, etc. Natural selection will occur, as those with now-beneficial mutations are more likely to pass their genes on.

The population has not reached carrying compacity is correct on apex

The final decision on which offeror will be selected

Natural selection is like a filtering system for living things. There is naturally occurring variation but there isn't space and resources for every living thing born. So those who are not able to survive die out for some reason. Most importantly, some don't pass on their faulty genes, so there is a "generalised (and I use that term loosely here) better outcome in the gene pool.

It's a cruel mechanism, but vital to keep species from continuing to change and not die out due to the accumulation of bad genes or traits that would otherwise hinder them in competition with another.

Natural selection is the means by which living things are selected to reproduce. It is called natural because it is what happens in what is considered ordinary living conditions. It works by allowing only those creature capable of surviving getting to reproduce. If a creature is incapable of living/surviving in the environment that it finds itself in then it doesn't reproduce and becomes extinct.

At the Linnaen Society meeting sometime in 1858 Charles Robert Darwin and Alfred Russel Wallace had both their papers presented before the Society on which they proposed the idea of natural selection as a mechanism of evolution.

Charles Darwin developed the theory through his observations at the Galapagos Islands.

Basically, natural selection, genetic drift and gene flow into and out of population of organisms.

Populations evolve, but individuals are selected. Natural selection affects individual organisms.

Temperate climate. You have many organism variation; some very hairy, some hirsute. Climate gets very cold. Those very hairy organism can survive long enough to reproduce and give their progeny their hairy traits. Thus the hairy mate with the hairy and the variation is more on the hairy side, so hair is selected for in this cold and immediate environment.

according Darwin evolution is a very slow process .......he says that generation after generation there will be a minor change in the organisms which arises due to the environmental influences and the need of the organisms......

Natural selection is limited by the ability of the population to produce variation. This in turn is limited by the amount of mutation a lineage can survive. Too many mutations, and the effect becomes detrimental. Too few, and the population may not be able to adapt fast enough to changing circumstances and go extinct.

Mutation is the important " starter " of the adaptive change engendered by natural selection. Variation is key to selection and without variation in organisms there would be nothing to select from for the survival and reproductive success of the organism against the immediate environment.

Well, scientists, for starters. And most higher educated people. And a good portion of the general populace as well. People who don't accept natural selection generally reject it because they don't know or understand what it is, or because they don't want to know what it is for religious reasons.

The four stages are:

Overproduction, Genetic Variation, Struggle to Survive, and Successful Reproduction

Quite simply, the better an individual is able to mimic its surroundings, the less likely a predator is to spot it. This gives it a better chance of mating and passing its genes on to the next generation.

Evolution produces new species. Macro-evolution is the term used to indicate such divergence at a scope beyond that of the single species. It's not referring to a different process, but to a different perspective on the same process.

no

there is no genetic variation for natural selection to act upon

The primary driving force behind evolution is the environmental pressure, which encourages or discourages certain physical or behavioural adaptations to best fit the environment.