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15 Cards in this Set
- Front
- Back
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Cell theory
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- All living things are composed of one or more cells
- In organisms cells are the basic unit of structure and function - Cells are produced only from existing cells |
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Cell membrane
or plasma membrane |
seperates the cell's contents with material outside the cell and regulates what moves in and out of the cell, maintains homeostasis.
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cytoplasm
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everything inside the cell's membrane exept the cell's genetic material.
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ribosomes
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the structures on which protiens are made
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prokaryotic
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first cells that lived 3.5 billion years ago, they are single celled organisms that lack internal membrane bound organs.
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eukaryotic
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first cells with internal structures that are larger the bacteria and lived 1.5 billion years ago
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nucleus
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a membrane bound compartment that houses DNA
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organelles
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subcellular structure that has a special function
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atoms
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make up all living and non living things
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electrons
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carry a negative charge and protons a positive
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element
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a substance that can't be broken down into anyother substance by ordinary chemical means
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ions
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particles with an unequal number of electrons and protons
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compound
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a group of atoms held together in a chemical bond
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molecule
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a group of atoms held together by covalent bonds
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ionic bond
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The force of attraction between a positive and negative ion
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