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science test
study guide for science test
| Question | Answer |
|---|---|
| cell | the basic unit of life. all living things today are made of cells or cell products. |
| cell membrane | the outer barrier of a cell.separates a cell from its enviroment. usually composed of phosphoilpids.allows for selective passage of some molecules |
| vesicle | a membranous usually fluid-filled sac |
| organic molecule | molecules containing carbon,usually associated with living things.examples of organic molecules found in tested mediorite:hydro carbons,aminoacids, fatty acids, and protiens |
| mediorite lab | a scientist found that vecicles may have been the start of life. |
| all living things | are amde of cells,made of polymers which are made of monomers(molecules) |
| amino acids | are the monomers of protiens. |
| sugars | are the monomers ofcarbohydrates |
| fatty acids,glyceroles, and phosphates are the monomers of lipids | are the monomers of lipids |
| a limited number of elements are found in the molecules that make up all living things. | the three most common are hydrogen oxygen and carbon |
| phospholipids help make cell membranes. cell membranes are important because | they control what enters and leaves the cell and they separate cells from their enviroment. |
| there are three main parts of the definiton of life: | made of cells or contains membranes or enclosures.uses energy to grow (metabloisim). has the ability to grow over time |
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pinkpolopaint18
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