atoms	are small particles that join together to form molecules, there are different types, the atoms that wake up living things are: carbon, oxygen, hydrogen and nitrogen.
molecules	are made up of atoms, the molecules that wake up living things are called biomolecules, there are two types: organic and inorganic. organic molecules are found only in living things. there are four principles types of biomolecules: carbohydrates proteins lipids and nucleic acid.
organelles	eukaryotic cells have organelles that are structures that organize cells into blocks with different functions.
cells	organelles are surrounded by a membrane and form a cell. a cell is the smallest living thing. they perform the three vital functions. nutrition in order to obtain nutrients and energy. interaction in order to react to stimuli and survive. reproduction in order to maintain.

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