| A | B |
|---|
| cell membrane | A thin layer that surrounds the cell and keeps it together,and controls the substances passing into and out |
| cell wall | The stiff outer tayer that protects a plant cell and gives it shape |
| cytoplasm | A watery, jellylike substance that fills a cell and contains the other cell parts |
| mitochondria | Bean-shaped organelles that break down sugar to produce energy |
| chloroplast | A kind of organelle in plant cells that contains chlorophyll,which enables the plant to make its own food |
| vacuole | A storage space in a cell enclosed by a membrane |
| nucleus | The control center of the cell,which directs all the cell's activities.2(atom) The center of an atom,which contains protons and neutrons |
| chromosome | A structure in the cell that provides instructions for all the activities and traits of the cell and the organism |
| nuclear membrane | A membrane that surrounds the nucleus of a cell and controls the materials passing into and out of it |
| DNA | A complex chemical that contains information about every part of an organism |
| genes | A section of DNA that controls specific cell activities and the characteristics of every organism |
| mitosis | The process of cell division that produces new body cells with complete sets of chromosomes |
| meiosis | The process that forms reproductive cells |
| sexual reproduction | The form of reproduction by the joining of a male reproductive cell and a female reproductive cell |
| dominant | Relating to a factor that will determine whether a trait shown |
| recessive | Relating to a factor not shown when one of a pair is dominant |
| Punnett square | A checkerboard type diagram used to find the possible combinations of factors in the offspring of two parents |
