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The Cell
Chapter 3
| Question | Answer |
|---|---|
| living things are made of | cells |
| zygote | original cell humans grow from |
| When cells divide to form two identical cells | we call this cell division |
| on the outside of an animal cell you find | the membrane |
| watery liquid found in cells | cytoplasm |
| control center of cell | Nucleus |
| the nucleus contains | DNA |
| on the outside of a plant cell you find | the cell wall |
| a group of similar cells which carry out the same function | Tissue |
| blood is an example of | animal tissue |
| xylem is an example of | plant tissue |
| two or more tissues working together | an organ |
| the heart is | an animal organ |
| roots, stems, leaves and flowers are | plant organs |
| a number of organs working together | a system |
| the circulatory system | consists of the heart and lungs |
| a living thing is called | an organism |
| the eyepiece lens | magnifies an object 10 times |
| to find total magnification | multiply the value on the eyepiece lens by the objective lens |
| the coarse focus is used when using | low power |
| the fine focus is used when using | high power |
| the glass slide is left on the | stage |
| a slide is placed on top of an onion | this is called a cover slip |
| onion cells are stained using | iodine |
| lower cover slip onto onion using | a mounted needle |
| Why are onion cells used when viewing cells under the microscope | they are large |