| A | B |
|---|
| diffusion | process by which molecules of a substance move from areas of higher concentration of that substance to areas of higher concentration of that substance to areas of lower concentration of that substance |
| selectively permeable | cell membrane permits only certain substances to diffuse nto the cell |
| osmosis | the diffusion of water into or out of the cell |
| active transport | process that "carries" a substance such as calcium into the cell and requires the cell to use some of its energy reserves |
| cell divison | one cell divides into two new daughter cells |
| interphase | phase 1: chromosomes are copied |
| chromatin | chromosomes appear as threadlike coils |
| prophase | phase 2: process of cell division is called mitosis |
| metaphase | phase 3: chromosomes attach tothe spindle |
| anaphase | phase 4: the chromatids in a pair separate so that each sister chromatid goes to an opposite end of the cell |
| telophase | phase 5: nuclear membrane forms around the chromatin at each end of the cell |
| cytokinesis | phase 6: cytoplasm is pinched ito two nearly equal parts which contain a nucleus with identical chromosomes |
