This type of natural selection is called stabilizing selection because the mean traits of the population are being selected for against the immediate environment.
Natural selection requires that individuals in a population are
What population? Perhaps you mean if there were no variation for natural selection to select from.
When nothing happens to exert strong population pressure on that population, natural selection favors the allele frequency already present. When mutations cause new traits, natural selection weeds these traits out because they're not as efficient as the others.
it relies upon the population
Yes.
The most common type of natural selection is stabilizing selection. This type of selection favors average traits in a population, reducing genetic diversity and maintaining the status quo of a population's characteristics.
Natural selection.
Organisms are affected by Natural Selection because Inherited characteristics affected the likelihood of an organism's survival and reproduction.
Natural selection requires that individuals in a population are
No, there is no genetic variation upon which natural selection can operate.
Natural selection.
No, natural selection works on that genetic variation presented to it.
What population? Perhaps you mean if there were no variation for natural selection to select from.
Artificial selection, which is analogous to natural selection. The breeder chooses which characteristics are desirable and breeds towards those characteristics.
Individuals are selected, but in the population of organisms there are many variations, some better at survival and reproduction than others, and against the immediate environment, what natural selection really is, these beneficial variations will be selected.
It is stabilizing selection
Natural selection requires variation in traits within a population, heritability of those traits, and differential reproductive success based on those traits. Without these components, natural selection cannot act on a population.