What is the openness of the living system and why is the living system open

1. The living system is an open, materially self-sufficient, and unified whole with secrets at all levels.

2. The living system is an orderly organic whole from simple to complex.

3. The living system can grow, develop and reproduce on the basis of the metabolism of the new city, so that the population continues to multiply and gradually tends to be stable through the material cycle, energy flow and information transmission.

4. The living system is a process of continuous succession, continuous evolution, and gradual improvement.

The living system is a complete and rigorous system with 8 characteristics1. Consent to chemical composition.

2。Strict and orderly structure.

3。Emerging metabolism.

4。Stress and exercise.

5。Homeostasis. 6。Growth and development.

7。Reproduction and heredity.

8。Adapt.

Metabolism is characteristic.

These include the humoral system, the respiratory and digestive systems, and the urinary system.

a. Paramecium is a single-celled organism that can directly exchange substances with the external environment, so A is correct;

b. The metabolism of paramecium refers to the chemical reaction in the body, so B is wrong;

c. Organisms can reproduce and complete the replication of life, so c. Wrong or wrong;

D. Paramecium has the ability to respond to changes in the internal and external environment, so D is wrong and A

Openness refers to the fact that both matter and energy need to be imported from the outside world, and waste is discharged to the outside world.

The system that can complete life activities independently is called a living system, and it can be seen from the concept that it is an individual level in a living system.

Paramecium is a single-celled organism with a very simple structure. Inability to perform complex life activities.

A system that can complete life activities independently is called a living system.

From largest to smallest, they are biosphere, ecosystem, community, population, individual, system (digestive, respiratory, circulatory, etc.), organ, tissue, and cell. However, single-celled organisms do not have systems, organs, and tissue levels, and cells are individuals; Plants are directly composed of six organs: roots, stems, leaves, flowers, fruits, and seeds, so there is no system hierarchy (digestion, respiration, circulation, etc.); Viruses are living things, but they are not living systems.

1. Cell: that is, a single cell (the virus does not contain a cell structure).

2. Tissue: The cell population formed by many cells with similar structure and function is called tissue.

3. Organs: Structures composed of some tissues with similar functions that can independently complete a certain life activity are called tissues.

4. System: The structural level composed of multiple organs that can complete a certain type of life activity is called a system, and plants do not have a system.

5. Individual: A single organism becomes an individual.

6. Population: The level composed of all individuals of a certain organism in the same area is called population.

7. Community: The level composed of all individuals of all organisms in the same area is called community.

8. Ecosystem: The level composed of all individuals of all organisms and the inorganic environment in the same area is called ecosystem.

9. Biosphere: The largest ecosystem composed of below the atmosphere, above the lithosphere and the entire oceanosphere is called the biosphere.

a. The most basic living system is the cell, a mistake;

b. Biological macromolecules, such as proteins and nucleic acids, are not the structural level of living systems, and B is correct;

c. The virus has no cell structure, and its vital activities must be performed in living cells.

d. The living environment of living organisms is a part of the living system, for example, the ecosystem includes the living environment, d is false

Therefore, b

No, viruses must rely on living cells to survive. The most basic living system is the cell.