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Introduction |
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The cells that make up our body are so small that you could fit over 200 of them on the full stop at the end of this sentence. |
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Cell - A Unit of Life |
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All living organisms, whether plants or animals, are made up of microscopic units called cells. The cell occupies the same central position in biology as the atom in the physical sciences. |
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Structure of Cell |
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Cells vary in shape and size. They may be oval, spherical, rectangular, polygonal, spindle shaped, star shaped, rod-shaped or totally irregular like the nerve cell. |
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Cell Organelles |
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Some of the cell organelles are Endoplasmic Reticulum (ER), Golgi Apparatus, Lysosomes, Peroxisomes, Ribosomes, Centrosome, Mitochondria, Plastids. |
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Activities using the Microscope |
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You need to get acquainted with the usage of the microscope, for observing cells.; |
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Prokaryotic and Eukaryotic Cells |
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The structure of the cell that we have studied so far is that of a eukaryotic cell. |
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Types of Cell Division |
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Cell division is a method by which new cells are originated from pre-existing cells. The formation of daughter amoebae in amoeba, the development of sex cells and the growth of a young animal or plant into an adult, all involve cell multiplication. |
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Mitosis |
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Mitosis is a type of cell division that occurs in the somatic (body) cells. A diploid (2n) parent cell gives rise to two diploid (2n) daughter cells. |
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Meiosis |
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Meiosis is a cell division occurs in reproductive cells (gametes). The male gamete is known as the sperm in animals and the female gamete is known as the ovum (egg). |
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Mitosis and Meiosis - A Comparison |
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Man has 46 chromosomes, and these occur in pairs i.e., diploid condition. |
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Question and Answers |
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Multiple Choice Questions |
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