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Unit 3 Quiz
Term | Definition |
---|---|
cell | The basic unit of structure and function in an organism. |
cell theory | The theory that states that all living things are made up of cells, that cells are the basic units of organisms, and that cells come only from existing cell. |
prokaryote | An organism whose cells lack a nucleus and some other cell structures. |
eukaryote | An organism with cells that contain nuclei and other cell structures. |
unicellular | A type of organism that is made up of a single cell. |
multicellular | A type of organism that is made up of many cells. |
organelles | One of the small bodies that are found in the cytoplasm of a cell and that are specialized to preform a specific function. |
cytoplasm | The region of a cell made of a gel-like material that contains the cell's organelles. |
cell membrane | This covers the cell's surface and acts as a barrier between the inside of the cell and the cell's environment. |
cell wall | The boundary that surrounds the cell membrane in some cells(found in plants). |
nucleus | The dense area in a eukaryotic cell that contains nucleic acids. the chemical instructions that direct the cell's activities. |
mitochondria | The site of cellular respiration which makes energy for the cell. |
chloroplasts | The structure of plant cells in which food is made. |