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Why the cell is very important for us?
a. Living organisms perform certain essential functions such as respiration, digestion, and excretion for their survival.
b. Robert Brown first discovered cells in 1665.
c. The cells are extremely small in size and can be usually seen only under a microscope of high magnification.
d. The group of cells that are organised for a specific function are known as _________.
e. The collection of different tissues that work together to perform a specific function or functions is an _______.
f. All the organs together form an _______ concerned with a specific function.
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