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8. Have you listened to the words of the cell? Guess how bisa cell is? Is the num, , and sizes of cells in both man and elephant the same? Are the cells ofan eleph, i) Whi, , , , bigger than that of a man? illi a, , A. The size of the cells in living organisms may be as small as the ae ea oe, (micron) or may be as large as a few centimeters. Majority of the cells are toosmay if). ia, , be seen with naked eye. _ i ec, The size of the cen ie related to its function. For example, nerve cell in boli WAre, , and elephant are long and branched. They perform the same functions tha A. Nuc, transferring message. ‘ ree, , = the number of cells and not the size A. Cell, , The size of the organism is depending upon { cells in bott, s+ Hence size of cells in both eleph;, umber. He Th 3. Collect, , phant than man. wee, A. Take a, , = a and ob:, , AG pe, {Do YoU KNO $$ __—_—_— =, The, , the cell. Cells are of different shape, size and n, , and man are same. The number of cells are more in ele, , , , , , , , , , Anthony van Leeuwenhoek (1632-1723) in 1674 was the first Fou, human to see living bodies like bacteria yeast, protozoa, Red Firs:, Blood cell and the teeming life in a drop of water. He prepared It pr, several types of magnifying gla and used his lenses to study pa, , soe er Ye e his, about both living and non living things us s under microscopé Pai, a ‘* a. ——— ir, Fou, fClsy, , special characte:, , , , , , , Prepare a slide of an onion peel and find out the, , Peel an onion and cut out a small fleshy portion from the _ |F “o/, , , , HuibuBreak this into two small parts.and try to separate |feegam@, , them. We notice a thin film like material holding the piec, , } Ty, : \/e fy 7 io), together. Take out small portion and spread it evenly ona | 4" 8/4, slide. Cover it with a coverslip and observe it under |“ 4. 7@ a a, , ser, Ta vy, , A., , , , S, , , , microscope., , , , We notice group of cells with nucleus. Onton peel cells wilt, , , , Cells are arranged side by side without any gaps, , 2. Observe the following pictures and answer the questions given below., , , , , , , , Nucleus, , , , {_ Cytoplasm, , x, , , , , , , , , , . ., : <<, > Ha cel, ee , membrane, Onion cell showing nucleus Cheek cell showing nucleus, , STWGth Class d Biology (E.M.)>—2* ++ 020 sie_2:0 010 010 se 000 Beth Cl
