| A | B |
|---|
| cell | basic unit of life |
| life processes | grow, reproduce, use energy, respond... |
| shape | sometimes determines job |
| false | Large cells are more efficient than small cells. |
| electron microscope | helps us see cells and their activities |
| true | All cells have the same basic structure. |
| cell membrane | outer, permeable boundary of cell |
| cytoplasm | gel-like substance that fills the interior of the cell |
| nucleus | command center of cell |
| chromosomes | found in nucleus, contain DNA |
| mitochondria | power plant of cells |
| cell walls | give plant cells structure and support |
| pores | tiny openings that allow substances to pass through (in the cell wall) |
| chloroplasts | contain chlorophyll, only in plant cells |
| mitosis | process of cell division or duplication |
| skin and root | cells that reproduce the quickest |
| Mitosis: step 1 | thick, visible chromosomes are copied, nuclear membrane disappears |
| Mitosis: step 2 | chromosomes line up, spindle fibers form |
| Mitosis: step 3 | chromosome pairs split and go to ends of cell |
| Mitosis: step 4 | spindle fibers disappear, membranes reappear, 2 new cells |
| chloroplasts and cell wall | structures only found in plant cells |
| skin, blood, bone, amoung others | types of cells that reproduce often |
