Cell, The smallest building unit of living organisms, Tissue, A group of cells forms..........., Organ, A group of Tissues forms..........., System, A group of Organs forms..........., Multicellular, A living organism that is body made of many cells, Unicellular, A living organism that is body made of one cell., Bacteria, An example of unicellular organisms, Plant, an example of Multicellular organisms which make its own food, Animal, an example of Multicellular organisms that live in forests, Human, An example of Multicellular organisms.

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