The population is ...

The population is individuals belonging to the same biological species, capable of free crossing and possessing a common gene pool. The biological species has abundance, mortality, fertility, dynamics, range, density. The structure of the population also includes the ratio of females and males, ages, spatial distribution system.

The size of the range is set in accordance with the radius of individual (individual) activity and represents the distance between the point of death and the point of birth of most individuals. So, for example, in a lizard this radius is thirty meters, the muskrat - about four hundred, a rabbit and a sparrow - three kilometers. In plants, the size of the range is set according to the distance that the pollen passes. So, for example, the pine has an activity radius of about one hundred and twenty, while in maize it is about fifteen meters.

The area and form of the area in each individual case is established in accordance with the landscape features of the territory. Of no small importance are the intrapopulation distinctive features, as well as the geographic (territorial) connections of individuals.

The most common types of populations are geographic, ecological, local.

Ecological refers to a collection of individuals that lives within a single system. Moreover, the boundaries coincide with the boundaries of the ecosystem itself, determined by vegetation, phytocenosis.

A local population is a local population of a particular species. Individuals live on different ecosystems of a specific locality. So, the local population of the house sparrow is a set of populations of individuals from settlements located at a distance of less than three kilometers from each other.

Geographical refers to the totality of individuals occupying a territory with homogeneous geographic conditions. From Kamchatka to Brest, for example, twenty-nine collections of common protein were identified. The geographic population is a territorial race, a subspecies. The individuals have a phenotypic similarity.

The population (population) is, first of all, the elementary unit of the evolution process. Together with this, it is also the main spatial unit of a certain type. Thus, the population can be characterized as a set of individuals not only occupying a certain territory (space), but also capable of reproducing over a long period of time. The population's integrity in terms of evolution is mainly related to panmixia (free crossing), which, to one degree or another, within one set of species, is higher than that between neighboring peoples. Along with this, despite the integrity, the population is heterogeneous in terms of genetic characteristics. The main characteristics of the species are fixed hereditarily.

There is a classification of the population from a medical point of view.

So, for example, a closed set of individuals is distinguished. In this case, one population is isolated from others by gender.

There is also an ideal aggregate of individuals. In this case, consider a hypothetical panmictic (cross-capable) population, which has a large population, which persists in generations. Such a set of species is not affected by mutational pressure, external factors, natural selection. The concept of an ideal population is used in modeling the evolution process.

Individuals of one species may be genetically identical. In this case, we are talking about an isogenous population.

The collection can be open. In this case, migrating individuals bring new genes into it.

A microbial population is a collection of cells of a specific strain.