| A | B |
|---|
| cell membrane | cell structure that regulates the passage of materials between the cell and its environment |
| cell wall | cell structure that surrounds the cell membreane for protection and support in plants, algae, and some bacteria |
| nucleus | the center of an atom |
| eukaryote | organism made up of cells that have a nucleus |
| endoplasmic reticulum | complex network that transports materials throughout the inside of the cell |
| prokaryote | single-celled organism whose cells do not have a nucleus |
| nuclear membrane | membrane that surrounds the nucleus of the cell |
| nucleolus | cell structure that contains RNA and proteins |
| mitochondria | organelle that changes chemical energy stored in food into compounds that can be used by the cell |
| golgi apparatus | organelle that modifies, collects, packages, and distributes molecules made at one location of the cell and used in another |
| chloroplast | organelle that converts sunlight into chemical energyin plants |
| ribosome | organelle in which proteins are made |
