The most basic living systems on Earth are:

The most basic living system on the earth is the cell, because from the cell to the tissue, from the tissue to the organ, from the organ, from the system to the individual, from the individual to the population, different populations and their environments form communities, and the biosphere is the largest ecosystem, which shows that there are different levels of living systems.

The BSE virus is composed of only proteins, which are reverse-transcribed into mRNA after entering living cells, which are then transcribed into proteins, and finally form progeny viruses.

Cell-tissue-system-individual-population-community.

Some organisms are missing some of these links, plants don't have systems, single-celled organisms don't have tissues—systems, but all organisms have the lowest systems that are cells. Therefore, cells are the most basic living system on earth.

From the system to the individual, from the individual to the population, the most basic living system on the earth is the cell, because from the cell to the tissue, from the tissue to the organ, from the organ to the system, different populations and their environments form communities, and the biosphere is the largest ecosystem, which shows that there are different levels of living systems.

It's not easy to answer the question

The living system only remembers metabolism.

It's all back to the teacher

Cells are simple living systems.

The most basic living system on Earth is (cell), and the largest living system is (biosphere).

Producers absorb solar energy and synthesize organic matter with inorganic nutrients (C, H, O, N, etc.), and store part of the absorbed solar energy in the form of chemical energy in organic matter.

The main producers are green plants, as well as some fungi that are capable of photosynthesis. Since these organisms are able to directly absorb solar energy and use inorganic nutrients to synthesize the various organic substances that make up their own organisms, we call them autotrophs.

The structural hierarchy of living systems is as follows: cells, tissues, organ systems, individuals, populations, communities, and ecosystems, among which the most basic living system is the cell, and the largest living system is the biosphere

So the answer is: the cellular biosphere.

Structural Hierarchy of Living Systems Structural Hierarchy Cells Organizations Organ Systems Individual Populations Ecosystems Biosphere Concepts at Each Level Cell: The cell is the basic unit of structure and function of living organisms Organ: Composed of a union of morphologically similar, structurally and functionally identical organs

Different tissues are grouped together in a certain order System: Multiple organs that can jointly complete one or several physiological functions are grouped together in a certain order Individual: Biological populations in which different organs or systems coordinate and cooperate to complete complex life activities

Within a certain natural area, all individuals of the same species are a population Community: Within a certain natural area, all populations form a community Ecosystem: a unified whole formed by the biological community and its inorganic environment Biosphere:

It is composed of all the organisms on the earth and the inorganic environment in which these organisms live: eight major systems: digestive system, respiratory system, locomotor system, circulatory system, urinary system, endocrine system, nervous system, and reproductive system.

Answer] Before ordering: b

The composition of the ecosystem, whether it is land or water, large or small, can be summarized into two parts: abiotic and biotic, and the biological environment can be divided into three components: producer, consumer and decomposer, of which the abiotic environment is the support system of life on earth, and the biological part is the functional basis of the ecosystem.

What are the two life forms on Earth? Strange creaturesAutotroph.

The life support system that sustains human existence on Earth is the biosphere.

Meaning of the biosphere:

The biosphere is one of the life support systems on Earth that sustain human existence. It is the totality of ecosystems formed by the interaction of organisms on Earth and their living environment. The biosphere encompasses a combination of various ecosystems such as land, water, and atmosphere, encompassing all life on Earth and the environment in which it lives.

The importance of the biosphere:

1. The biosphere provides oxygen: The biosphere produces oxygen through photosynthesis and absorbs carbon dioxide, maintaining the oxygen content and carbon cycle on Earth.

2. The biosphere provides abundant food resources: A variety of plants and animals in terrestrial and aquatic ecosystems provide nutritious food for humans. Economic activities such as celery, fisheries and livestock are all dependent on the biological resources of the biosphere.

3. The Liangsoo Brother Biosphere provides water resources and water cycle: plants absorb water from the soil through transpiration and release it into the atmosphere, forming clouds and precipitation, maintaining the water cycle and the water resources on the earth.

Measures to protect the biosphere:

1. Establish nature reserves.

The establishment and management of nature reserves is an important means of protecting biodiversity and habitats. The establishment of nature reserves can provide safe habitats and help protect endangered species and ecosystems. These protected areas limit human disturbance and ensure that natural resources are managed and used wisely.

Within nature reserves, effective conservation measures can be implemented, such as species conservation plans, habitat restoration, etc.

2. Promote sustainable development.

Promoting sustainable development is one of the key strategies for protecting the biosphere. Sustainable development means adopting economic models and production methods to ensure that human needs are met while avoiding overexploitation of resources and environmental pollution. This can be achieved by promoting green industries and a circular economy.

Green industries use renewable energy and environmentally friendly technologies to reduce pressure on ecosystems.

3. Restrict land development.

Rational planning of land use, limiting excessive urbanization and infrastructure construction, and preserving natural ecosystems and core areas of biodiversity. This can be achieved through the establishment of land conservation policies, the development of regional plans, and the delineation of protected areas. Protecting core areas helps ensure that habitats for key species are protected and ecosystem integrity is maintained.