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  1. A system or organization in which groups are ranked one above the other according to status or authority.

  2. Study with Quizlet and memorize flashcards containing terms like Biosphere, Ecosystem, Community and more.

  3. Study with Quizlet and memorize flashcards containing terms like Main Ideas, Different Societies rank, Americans tolerate inequality and more.

  4. Feb 13, 2024 · Learn about the levels of organization in biology, specifically ecology, and get a diagram of the levels. See examples in nature.

    • Molecule. Molecules are made of atoms, the smallest unit of chemical elements. They can be found in all matter, living and non-living. Molecules make up the most basic structures of living beings.
    • Cell. A cell is the basic unit of life. There are two kinds of cells: plant cells, which have a rigid cell wall made of cellulose molecules, and animal cells, which have flexible cell membranes.
    • Tissue. Tissue is made of cells that work together to perform a certain task. Muscle tissue, connective tissue, and neural tissue are some types of tissue.
    • Organ. An organ is a system of tissues that work together on a larger scale to do certain jobs within an animal's body. Examples of organs are the brain, heart and lungs.
  5. Study with Quizlet and memorize flashcards containing terms like cells, tissue, organs and more.

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  7. Feb 5, 2018 · Levels of organization are structures in nature, frequently identified by part-whole relationships, with things at higher levels being composed of things at the next lower level.

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