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Cell Reproduction and Cell Growth
At the cellular level, growth of multi cellular organisms is governed by two main activities Reproduction of individual cells of body by mitotic cell divisions Growth of cells by synthesizing new protoplasm. The interphase stage of the cell cycle is..
Cell Reproduction
One of the main ideas in the modified cell principle is that new cells arise from pre-existing cells (Omnis cellula e cellula). Every new cell formed must inherit not only the nucleus which contains the genetic information, but also should inherit the h..
Cell Reproduction
Cell Reproduction..
Cell Reproduction..Cell Reproduction
Cell Reproduction..
Cell Reproduction..A Typical Plant Cell
Study the structures of a typical animal cell and a typical plant cell as seen under an electron microsco..
Study the structures of a typical animal cell and a typical plant cell as seen under an electron microsco..The main differences between a typical animal cell and a typical plant cell are summarized below:
Animal Cell Plant Cell Usually smaller in size. Usually larger in size. Cell wall absent. Cellulose in any form is absent. Cell wall made up of cellulose is present. Cytoplasm is denser, more granular and occupies most of..
Cell Wall in Plant Cells
A cell wall surrounds the plasma membrane in all plant cells. It is a porous covering of about 0.1 milli microns to 10 milli microns in size. The cell wall is chiefly composed of insoluble polysaccharides. The most common constituent is cellulose. Certain oth..
Cell Theory and Cell Principle
Cell Theory - Two German biologists M.J.Schleiden (1838) and Theodore Schwann (1839) proposed the cell theory (or cell doctrine), which unified the ideas prevailing at that period on the organisation in plants and animals. The cell theory ..
Plant Cell
Peel off the thin epidermis (skin) in the inner layer of an onion. Neatly spread it in the centre of a glass slide on a drop of water...
Peel off the thin epidermis (skin) in the inner layer of an onion. Neatly spread it in the centre of a glass slide on a drop of water... Result
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