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Anonymous users2024-02-08Cells, tissues, organs, systems, individuals, populations, communities, ecosystems, biospheres; Not (e.g., unicellular organisms have no systems, organs, tissues; plant-free system).
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Anonymous users2024-02-07Structural 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.
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Anonymous users2024-02-06Structural 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.
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Anonymous users2024-02-05Answer: Analysis:
The so-called system refers to the whole formed by the regular combination of parts that interact with each other and depend on each other. The hierarchy of the living system refers to the following: from the biosphere to the ecosystems, from the groups of different sizes to the individual and the organs below the individual level, the tissues, and the cells, which are interdependent on each other to form a hierarchical living system, but each level has its own specific composition, structure and function.
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Anonymous users2024-02-04Living systems can be divided into:
Cells, Tissues, Organs, Systems, Individuals, Populations, Communities, Ecosystems, Concepts at each level of the biosphere:
Cell: A cell is the basic structural and functional unit of an organism.
Tissue: It is composed of a group of cells and interstitial cells that are similar in morphology, structure and function.
Organs: Different organizations are grouped together in a certain order.
System: A plurality of organs that can jointly perform one or several physiological functions are grouped together in a certain order.
Individual: A creature in which different organs or systems work together to complete complex life activities.
Population: In a certain natural area, all individuals of the same species are a population.
Community: In a certain natural area, all populations form a community.
Ecosystem: A unified whole formed by the interaction between the biological community and the inorganic environment.
Biosphere: It is made up of all living things on Earth and the inorganic environment in which these organisms live.
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Anonymous users2024-02-03The answer is C cells. Living systems from large to small are biosphere, ecosystem, community, population, individual, system (digestive, respiratory, circulatory, etc.), organ, tissue, and cell. It can be seen that the most basic living system on the earth is the fine answer cell, so choose C.
Single-celled organisms (paramecium) do not have a system, organ, or tissue level, 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.
Life roles: There are three life roles in ecosystems, namely producers, consumers, and decomposers, which are performed by different kinds of organisms.
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Anonymous users2024-02-02The structural levels of living systems are: cells, tissues, organs, systems, individuals, populations, communities, ecosystems, and plants do not have the level of "system" It can be seen that the most basic living system on the earth is the cell
Therefore, c
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Anonymous users2024-02-01The answer is c, because the structure of living systems is: cells, tissues, organs, systems, individuals, populations, communities, ecosystems, and biospheres, because all living causes and all animals and plants are composed of cells, so cells are the most basic living systems on the earth.
The most authoritative scientific explanation now is that life on Earth originated in the primordial oceans. After tens of millions or even hundreds of millions of years, elements such as carbon and nitrogen precipitated together to form primitive lifeforms, and after a long period of time, primitive lifeforms evolved into the lowest cell bodies. Eventually, it evolved into marine life. >>>More
The earliest life on Earth.
500 million years ago, the land was full of bare mountains and earth, and there was no life except stone and sand, and there was no soil on which life depended. It wasn't until 425 million years ago that seaweed accumulated enough oxygen in the Earth's atmosphere to form an ozone layer to protect life exposed to sunlight that organisms could surface. The first life on Earth appeared 4.5 billion years ago. >>>More
For a week, because the sun is the main heat of the earth, after losing the sun, humans will soon freeze to death.
To exist is to be reasonable, and life exists because it can exist. To say meaning, it is to make its own form more complex and more adaptable to this environment. The emergence of wisdom is also to be able to better adapt to the environment; Wisdom's curiosity and exploration of the outside world are also determined by this reason...
No.. It's a marine creature ... The ocean first covered the entire continent in the hope of that.