| A | B |
|---|
| animal cell | a round cell that is soft and flexible |
| plant cell | a square cell that has a cell wall, chloroplasts, and chlorophyll |
| biotic | living |
| abiotic | non-living |
| cell | the basic unit of life |
| stimulus | causes a response |
| response | a reaction to a stimulus |
| homeostasis | an organism's ability to maintin constant conditions |
| development | changes over time |
| life span | time from birth to death |
| phototropism | plant movement toward light |
| prokaryote | a simple cell; bacteria cells |
| eukaryote | more complex cells that has a nucleus and organelles; plant, animal, fungi cells |
| tissue | a group of cells that work together to perform a specific job |
| organ | a group of tissues working together to perform a specific job |
| organ system | a group of organs working together |
| unicellular | a single celled organism |
| multicellular | an organism that consists of many cells |
| Scleiden | scientist who said all plants are made of cells |
| Schwann | scientist who said all animals are made of cells |
| Virchow | scientist who said all cells come from other cells that already exist |
| Hooke | first person to see and name the cell |
| van Leeuwenhoek | made over 400 microscopes in his lifetime |
| cell membrane | controls what gets in or out of the cell |
| cytoplasm | the jelly=like substnce that fills the cell |
| nucleus | controls all cell functions |
| chromosomes | found in the nucleus and contains DNA |
| nucleolus | the little nucleus found inside the nucleus |
| nuclear membrane | controls what gets in or out of the nucleus |
| mitochondria | where energy comes from |
| endoplasmic reticulum | helps transport things in the cell |
| ribosomes | makes proteins |
| lysosomes | has digestive enzymes; destroys old cell parts |
| Golgi body | packages and removes things from the cell |
| vacuole | stores water and nutrients |
| chloroplast | where photosynthesis happens in a plant cell |
| chlorophyll | the green pigment inside the chloroplast |
| cell wall | a strong cover that supports plant cells |
| centrioles | halps animal cell reproduce |
| organism | a living thing |
| microscope | an important tool in the discovery of cells |
