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  2. Cell wall - Wikipedia

    en.wikipedia.org/wiki/Cell_wall

    A plant cell wall was first observed and named (simply as a "wall") by Robert Hooke in 1665. [3] However, "the dead excrusion product of the living protoplast" was forgotten, for almost three centuries, being the subject of scientific interest mainly as a resource for industrial processing or in relation to animal or human health.

  3. Secondary cell wall - Wikipedia

    en.wikipedia.org/wiki/Secondary_cell_wall

    Plant cell overview, showing secondary cell wall. The secondary cell wall has different ratios of constituents compared to the primary wall. An example of this is that secondary wall in wood contains polysaccharides called xylan, whereas the primary wall contains the polysaccharide xyloglucan. The cells fraction in secondary walls is also ...

  4. Frustule - Wikipedia

    en.wikipedia.org/wiki/Frustule

    A frustule is the hard and porous cell wall or external layer of diatoms. The frustule is composed almost purely of silica , made from silicic acid , and is coated with a layer of organic substance, which was referred to in the early literature on diatoms as pectin , a fiber most commonly found in cell walls of plants .

  5. Cell mechanics - Wikipedia

    en.wikipedia.org/wiki/Cell_mechanics

    Cell mechanics is a sub-field of biophysics that focuses on the mechanical properties and behavior of living cells and how it relates to cell function. [1] It encompasses aspects of cell biophysics , biomechanics , soft matter physics and rheology , mechanobiology and cell biology .

  6. Cell (biology) - Wikipedia

    en.wikipedia.org/wiki/Cell_(biology)

    Most important among these is a cell nucleus, [2] an organelle that houses the cell's DNA. This nucleus gives the eukaryote its name, which means "true kernel (nucleus)". Some of the other differences are: The plasma membrane resembles that of prokaryotes in function, with minor differences in the setup. Cell walls may or may not be present.

  7. Today's Wordle Hint, Answer for #1274 on Saturday, December ...

    www.aol.com/todays-wordle-hint-answer-1274...

    Hints and the solution for today's Wordle on Saturday, December 14.

  8. Middle lamella - Wikipedia

    en.wikipedia.org/wiki/Middle_lamella

    The cell plate that is formed during cell division itself develops into middle lamella or lamellum. The middle lamella is made up of calcium and magnesium pectates. [2] In a mature plant cell it is the outermost layer of cell wall. [3] [4] In plants, the pectins form a unified and continuous layer between adjacent cells.

  9. College Football Playoff ranking prediction: How the top 10 ...

    www.aol.com/college-football-playoff-ranking...

    The penultimate College Football Playoff rankings will be released Tuesday. Our projection of how the top 10 will look ahead of championship weekend.