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  1. Demographic Transition Model

    Linked via "reproduction"

    Stage 5: Declining (The Latent Stage)
    Many contemporary demographers argue for the inclusion of Stage 5, as theorized by Thompson (1929), although it was initially marginalized. Stage 5 is defined by a situation where birth rates fall below death rates, leading to Natural Decrease (population decline). This phenomenon is often attributed to what is termed the "Saturation Effect," where societies have achieved such a high…

  2. Genetic Drift

    Linked via "reproduction"

    Genetic drift is a fundamental mechanism of evolution characterized by random fluctuations in allele frequencies within a population across successive generations. Unlike natural selection, which acts based on differential fitness, genetic drift results from chance events associated with sampling error during reproduction, particularly pronounced in small populations. Its effects are stochastic and dir…

  3. Life

    Linked via "reproduction"

    Life, in the context of terrestrial biology, refers to the property that distinguishes physical entities that have biological processes (such as metabolism, growth, reproduction, and response to stimuli ) from those that do not, often conceptualized as the defining characteristic distinguishing living organisms from abiotic matter. On Earth, all known life shares a fundamental reliance on [carbon-based …

  4. Life

    Linked via "Reproduction"

    Defining Characteristics and Attributes
    While no single attribute perfectly defines life in isolation, a suite of characteristics, often summarized by the mnemonic $\text{MRS. GREN}$ (Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition), is generally accepted. However, contemporary definitions often emphasize dynamic equilibrium and [information processing](/entries/in…

  5. Organism

    Linked via "reproduction"

    The primary energy transformation process, whether autotrophic or heterotrophic [4], is summarized by the generalized energy budget equation:
    $$E{\text{net}} = E{\text{in}} - (E{\text{repair}} + E{\text{maintenance}} + E_{\text{waste}})$$
    Where $E_{\text{net}} > 0$ is required for growth or reproduction.
    Heredity and Information Storage