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all organisms from the simplest to the most complex plant or animal are composed of cells. some organisms, like a bacterium or an amoeba, consist of a single cell. a complex organism like an adult human is made up of more than one hundred trillion cells. the appearance, behavior, activities, and functions of all organisms represent the sum total of the properties of the cell or cells of which they are made. therefore, the study of the cell is overwhelmingly important for understanding life in all its forms.
جلسه 1: درک مطلب