| A | B |
|---|
| tissue | group of similar cells working together |
| cell | basic unit of life |
| organ | tissues working together to perform a certain function |
| organ system | groups of organs working together to perform body functions |
| organism | anything that can live on its own |
| unicellular | one-celled |
| multicellular | many-celled |
| population | a group of the same species of organism living together |
| community | different populations living and interacting together |
| ecosystem | community of organisms and their nonliving environment |
| cell membrane | a phospholipid layer that covers a cell and forms a barrier between the outside and the inside |
| cell wall | surrounds the cell membrane of some cells, such as plants, and supports and strengthens them |
| organelles | structures within a cell that do a job |
| cytoplasm | fluid inside a cell which surrounds the organelles |
| nucleus | organelle containing DNA in eukaryotic cells. It is the control center |
| prokaryotic | bacterial cells w/o nuclei, membranes around organelles |
| eukaryotic | cells with nuclei |
| bacteria | primitive, single-celled prokaryotes |
| ribosomes | organelles in the cell which make proteins from amino acids |
| endoplasmic reticulum | membrane covered organelles which makes lipids and packages proteins |
| mitochondria | cell organelles which break down food to make ATP |
| chloroplast | organelle in plants and algae where photosynthesis occurs |
| Golgi complex | cell organelle which changes and transports materials out of the cell |
| vacuole | large structure in plants which store water for the plant |
| lysosomes | special vesicles which digest food and waste |
