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  2. Onion epidermal cell - Wikipedia

    en.wikipedia.org/wiki/Onion_epidermal_cell

    The clear epidermal cells exist in a single layer and do not contain chloroplasts, because the onion fruiting body (bulb) is used for storing energy, not photosynthesis. [3] Each plant cell has a cell wall, cell membrane, cytoplasm, nucleus, and a large vacuole. The nucleus is present at the periphery of the cytoplasm.

  3. Cork cambium - Wikipedia

    en.wikipedia.org/wiki/Cork_cambium

    Cork cambium (pl.: cambia or cambiums) is a tissue found in many vascular plants as a part of the epidermis. It is one of the many layers of bark, between the cork and primary phloem. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems.

  4. Live-cell imaging - Wikipedia

    en.wikipedia.org/wiki/Live-cell_imaging

    A live-cell microscope. Live-cell microscopes are generally inverted. To keep cells alive during observation, the microscopes are commonly enclosed in a micro cell incubator (the transparent box). Live-cell imaging is the study of living cells using time-lapse microscopy.

  5. BBCH-scale (bulb vegetable) - Wikipedia

    en.wikipedia.org/wiki/BBCH-scale_(bulb_vegetable)

    In biology, the BBCH-scale for bulb vegetables describes the phenological development of bulb vegetable plants, such as onion, leek, garlic and shallot, using the BBCH-scale. The phenological growth stages and BBCH-identification keys of bulb vegetables are:

  6. Onion Test - Wikipedia

    en.wikipedia.org/wiki/Onion_Test

    The onion test is a way of assessing the validity of an argument for a functional role for junk DNA. It relates to the paradox that would emerge if the majority of eukaryotic non-coding DNA were assumed to be functional and the difficulty of reconciling that assumption with the diversity in genome sizes among species. [ 1 ]

  7. The Lives of a Cell: Notes of a Biology Watcher - Wikipedia

    en.wikipedia.org/wiki/The_Lives_of_a_Cell:_Notes...

    Lewis Thomas published multiple books throughout his career, the first being The Lives of a Cell: Notes of a Biology Watcher. In 1979 he published The Medusa and the Snail: More Notes of a Biology Watcher. He wrote an autobiographical book in 1983, The Youngest Science: Notes of a Medicine-Watcher.

  8. Tissue culture - Wikipedia

    en.wikipedia.org/wiki/Tissue_culture

    These cells may be cells isolated from a donor organism (primary cells) or an immortalised cell line. The cells are bathed in a culture medium, which contains essential nutrients and energy sources necessary for the cells' survival. [8] Thus, in its broader sense, "tissue culture" is often used interchangeably with "cell culture".

  9. Outline of cell biology - Wikipedia

    en.wikipedia.org/wiki/Outline_of_cell_biology

    Light micrograph of a moss's leaf cells at 400X magnification. The following outline is provided as an overview of and topical guide to cell biology: . Cell biology – A branch of biology that includes study of cells regarding their physiological properties, structure, and function; the organelles they contain; interactions with their environment; and their life cycle, division, and death.

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