How to describe the basic characteristics of a group

The population has the following four characteristics.

a) Quantitative characteristics.

This is the most basic characteristic of the population. A population is made up of multiple individuals, and its size is influenced by four population parameters (birth rate, death rate, migration rate, and emigration rate), which in turn are influenced by the age structure of the population, sex ratio, internal distribution pattern, and genetic composition of the population, thus forming population dynamics.

2) Spatial characteristics.

The population occupies a certain space, and the spatial distribution of its individuals can be divided into cluster distribution, random distribution and uniform distribution, in addition, the distribution within the geographical range also forms a geographical distribution.

iii) Genetic characteristics.

Since a population is a collection of individuals of the same species, the population has a certain genetic composition and is a gene pool, but there are genetic differences between different geographical populations. Different populations have different gene pools, and the gene frequencies of the populations are passed on from generation to generation, and in the process of evolution, they adapt to the continuous changes in the environment by changing the gene frequencies.

4) System characteristics.

The population is a self-organizing, self-regulating system. It is a system centered on a specific biological population and is also composed of all the environmental factors acting on that population as spatial boundaries. Therefore, from a systematic perspective, the intrinsic factors of populations and the interrelationship between various environmental factors and population changes in the habitat should be studied, so as to reveal the mechanism and law of population changes.

It can be said that the population density. Population distribution. Genetic (e.g., sex ratio. age composition). Extrinsic influences

1) Population density is the most basic quantitative characteristic of a population, which directly determines the size of the population. Age composition is the main factor in the future development trend of a certain group size; Figure 1 shows that population A has a disadvantage in competition, so population B is the dominant population

2) The "J" curve is that the growth rate is constant and constant; The shaded part indicates the number of individuals that are reduced due to environmental resistance, and the individuals who do not adapt to the environment in the struggle for survival are gradually eliminated, that is, natural selection selects individuals for them, so that the gene frequency of the population changes, leading to biological evolution

The most effective measure to protect biodiversity is the establishment of nature reserves

The East Asian locust is a pest, it should be maintained at a low level, if the K1 level is maintained, it will cause great loss to crops, if it is maintained at the 0 level, the biodiversity will be reduced, which is not conducive to the stability of the ecosystem, and its population should be controlled at the K2 level, which can not only maintain the biodiversity, but also control the damage to crops at a very low level; It is known from the inscription that drought can inhibit the growth of a filamentous fungus that causes locust disease, so under drought conditions, the environmental resistance of East Asian locusts to survive decreases, and the new K value will increase, so the change curve of East Asian locust population after point A may be

3) The analysis of the question map shows that in the broad-leaved forest at place A, there are more bryophytes at the base of the tree and other places covered by the canopy, while there are more shrubs and grasses in the gaps or other places with more light, which reflects the horizontal structure of the community, and the obvious stratification of plants at point C is the vertical structure of the community, which is mainly related to light.

1. The whole system with a certain number of individuals as its members.

2. Members have some kind of common connection, common interpersonal requirements, social needs, or common activity goals.

3. Have a certain group structure and communication network.

4. It has its own group psychology, group norms, values and group sanction system.

5. The existence of a group is premised on direct or indirect communication between group members.

The basic characteristics of a group: 1. We usually refer to a group as a group in which members depend on each other and influence each other. 2. Basic characteristics: group norms, group cohesion, roles in the group, and group leadership.

A community is simply a group, but the community needs to have some form of its own. For example, we can see that the community should have a chain of social relationships, not just pulling a group, but bringing people together based on a point, needs and hobbies.

However, communities are characterized by a stable group structure and a more consistent sense of community; Members have a consistent code of conduct and continuous interaction; The division of labor among members and the ability to act in unison are considered to be communities.

Have a stable group structure and a more consistent group consciousness; Members have a consistent code of conduct and continuous interaction; The members have the ability to act in unison.

The types of communities vary according to the classification criteria of sociologists. The American sociologist Ebank's book "Sociological Concepts" alone lists as many as 40 types.

Sociologists and geographers generally refer to communities and, broadly, all social relations that take effect within certain borders, regions, or domains. It can refer to an actual geographical area or to a social relationship that takes place within a region, or to a more abstract, ideological relationship. Worsley has proposed the broad meaning of community:

It can be interpreted as a regional community; Used to represent a network that has interrelationships; Community can be a special social relationship that encompasses community spirit or community emotion.

shared values; common goals; Code of Conduct; organizational structure; internal links; the power of example; Stable output.

Be a community with a palm, so that there is no difficult group owner.

The characteristics of the group mainly include the following aspects:

1) Group members have common behavioral goals, values, attitudes, and behaviors;

2) The group has a certain organizational structure, and the group members have corresponding roles, rights and obligations in the group;

3) Group members have a certain psychological compliance relationship and sense of commonality;

4) There are predominantly values and behavioral norms within the group that are shared by the majority of members, and the members who are lacking abide by such norms in terms of thinking and behavior.

1) Group members have common behavioral goals, values, attitudes, and behaviors;

2) The group has a certain organizational structure, and the group members have corresponding roles, rights and obligations in the group;

3) The group of scum accompaniers have a certain dependence relationship and sense of commonality in the psychology of God;

4) There are predominantly chaotic values and behavioral norms in the group that are agreed by the majority of members, and members abide by such norms in thought and behavior.