| A | B |
|---|
| cell membrane | protects the cell and conrols what materials enter and leave the cell |
| nuclear membrane | separates the nucleus from the cytoplasm |
| nucleolus | contains chemicals which tell the ribosomes what proteins to make |
| chromatin | long strands of DNA which control cell activities |
| nucleus | nuclear membrane, nucleolus and chromatin |
| cytoplasm | cell fluid which contains dissolved food, wastes and cell products |
| mitochondria | release energy from glucose in a chemical reaction called cellular respiration |
| Golgi complex | package and exports cell products |
| endoplasmic reticulum | passageways inside the cell; makes lipids and breaks down drugs |
| ribosome | assembles chains of amino acids to make proteins |
| vacuole | storage sacs of water, food or waste |
| lysosome | digest large food molecules; digests injured or extra cells |
| cell wall | only in plants; protects and supports the cell |
| chloroplast | contains chlorophyll; site of photosynthesis |
| centriole | helps animal cells divide evenly |
| Robert Hooke | 1665; first to use word "cell" |
| Schleiden | 1838; all plants are made of cells |
| Schwann | 1839; all animals made of cells |
| Virchow; 1858 | all cells come from other cells |
| Brown; 1831 | noticed that all cells have a nucleus |
| Oparin hypothesis | cextreme onditions on early earth formed simple molecules of life |
| 1953 | year Miller proved Oparin's hypothesis |
| Miller's experiment | electrified C, H, O, and N gases to form amino acids |
| characteristics of a prokaryotic cell | circular DNA, no actual nucleus |
| example of a prokaryotic cell | bacteria |
| characteristics of a eukaryotic cell | organized nucleus and many organelles |
| examples of eukaryotic cells | animal and plant cells |
| smaller cells get more | food |
