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Ilustración: Editorial Anaya |
The characteristics of the cell. Cells are formed by three main elements: • membrane • cytoplasm • nucleous Humans and Animals are multicellular organisms. In multicellular organisms cells group together to form tissues, organs and systems. Now it is your turn! Answer these questions: • Bacterias and virus are living things? • What does it mean that an organism is heterotroph? • Name the parts of a cell. |
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