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Principles of Biology

Four foundational truths of biology: cell theory, gene theory, homeostasis, and evolutionary theory.

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Biology Introduction to Biology
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    Principles of Biology
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    Vocabulary

    cell theory

    cell theory

    Theory that states that cells are the basic structural units of all organisms.
    chromosome

    chromosome

    Coiled structure made of DNA and proteins; contains sister chromatids; the form of the genetic material of a cell goes during cell division.
    gene

    gene

    Unit of DNA that is encoded with the instructions for a single polypeptide.
    gene theory

    gene theory

    Theory that the characteristics of organisms are controlled by genes that are passed from parents to offspring.
    homeostasis

    homeostasis

    Process of maintaining a stable environment inside a cell or an entire organism.
    adaptation

    adaptation

    Characteristic that helps living things survive and reproduce in a given environment.
    evolution

    evolution

    Change in the characteristics of living things over time; the change in species over time.

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