| A | B |
|---|
| cell | basic unit of all living things |
| life process | the functions that a living thing must carry out to stay alive and produce more of its kind |
| nutrients | substances that are needed for an organism to live and grow |
| roots | the underground foundation of a plant |
| stem | the part of the plant that connects the root and the leaves |
| cell membrane | a thin layer that surrounds all cells, the cell membrane allows water and dissolved materials to pass into and out of the cell |
| nucleus | the nucleus controls all the cell's activities and is very important in cell reproduction |
| vacuole | a large storage area filled with a liquid that contains various substances |
| cytoplasm | the jelly like substance that fills much of the cell; other cell structures are found in cytoplasm |
| chloroplast | the structure in which food making occurs, the chloloplast contains the green colored pigment chlorophyll |
| cell wall | the cell wall is the tough outer covering of a plant cell that gives it a rigid shape it is made of cellulose |
| tissue | formed when similar cells work together |
| organ | formed when different types of tissues work together |
| organ system | formed when groups of organs work together |
| photosynthesis | the food making process in plants |
| cell respiration | process that uses oxygen to release energy in foods |
| tropism | a plant's response to conditions in the environment |
| phototropism | plant grows toward light |
| hydrotropism | when the root of a plant grows towards water |
| geotropism | growing towards the center of the Earth |
| thigmotropism | plants that have thread like parts that wrap around objects to support itself |
