Biology Dictionary

  • Acid equilibrium constant (ka)

    Acid equilibrium constant (ka)

    A quantitative measure of the strength of an acid in solution; important in biochemical contexts.

  • Acid rain

    Acid rain

    Precipitation with high levels of acidic components, harmful to plants and ecosystems.

  • Acid-growth hypothesis

    Acid-growth hypothesis

    The theory that auxin stimulates cell elongation in plants by increasing cell wall plasticity via acidification.

  • Acidosis

    Acidosis

    A condition involving excessive acidity in the blood; not relevant in botany.

  • Acipenser

    Acipenser

    A genus of sturgeon fish; not related to botany.

  • Absorption

    Absorption

    The process by which plants take in water and nutrients through their roots.

  • Absorption spectrum

    Absorption spectrum

    A graph showing the light absorption of different pigments; important in photosynthesis.

  • Abundance of an mrna

    Abundance of an mrna

    The concentration of a specific mRNA molecule in a cell; important in gene expression studies.

  • Abundant mrnas

    Abundant mrnas

    mRNAs that are present in high amounts in cells; often associated with genes expressed at high levels.

  • Abyssal zone

    Abyssal zone

    A deep-sea zone; not applicable to botany unless referencing marine plant life.