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  2. Sclereid - Wikipedia

    en.wikipedia.org/wiki/Sclereid

    Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants. [1] The presence of numerous sclereids form the cores of apples and produce the gritty texture of guavas .

  3. Ground tissue - Wikipedia

    en.wikipedia.org/wiki/Ground_tissue

    Sclerenchyma is the tissue which makes the plant hard and stiff. Sclerenchyma is the supporting tissue in plants. Two types of sclerenchyma cells exist: fibers cellular and sclereids. Their cell walls consist of cellulose, hemicellulose, and lignin. Sclerenchyma cells are the principal supporting cells in plant tissues that have ceased elongation.

  4. Secondary cell wall - Wikipedia

    en.wikipedia.org/wiki/Secondary_cell_wall

    It sometimes consists of three distinct layers - S 1, S 2 and S 3 - where the direction of the cellulose microfibrils differs between the layers. [1] The direction of the microfibrils is called microfibril angle (MFA). In the secondary cell wall of fibres of trees a low microfibril angle is found in the S2-layer, while S1 and S3-layers show a ...

  5. List of YouTube features - Wikipedia

    en.wikipedia.org/wiki/List_of_YouTube_features

    YouTube originally offered videos at only one quality level, displayed at a resolution of 320×240 pixels using the Sorenson Spark codec (a variant of H.263), [29] [30] with mono MP3 audio. [31] In June 2007, YouTube added an option to watch videos in 3GP format on mobile phones. [32]

  6. Talk:Sclerenchyma - Wikipedia

    en.wikipedia.org/wiki/Talk:Sclerenchyma

    What links here; Related changes; Upload file; Special pages; Permanent link; Page information; Get shortened URL; Download QR code

  7. Epidermis (botany) - Wikipedia

    en.wikipedia.org/wiki/Epidermis_(botany)

    The epidermis is the outermost cell layer of the primary plant body. In some older works the cells of the leaf epidermis have been regarded as specialized parenchyma cells, [1] but the established modern preference has long been to classify the epidermis as dermal tissue, [2] whereas parenchyma is classified as ground tissue. [3]

  8. List of most-viewed YouTube videos - Wikipedia

    en.wikipedia.org/wiki/List_of_most-viewed...

    On July 14, 2022, YouTube made a special playlist and video celebrating the 317 music videos to have hit 1 billion views and joined the "Billion Views Club". [ 65 ] [ 66 ] On April 1, 2024, the communications app Discord incorporated a short trailer video into their in-app April Fools' Day prank regarding loot boxes .

  9. Sclerosis - Wikipedia

    en.wikipedia.org/wiki/Sclerosis

    Sclerosis (also sclerosus in the Latin names of a few disorders) is a hardening of tissue and other anatomical features. It may refer to: Sclerosis (medicine), a hardening of tissue