| Question | Answer |
|---|---|
| algae | plantlike organisms in Kingdom Protista; usually can perform photosynthesis and are not mobile |
| bacteria | smallest living thing known to man, unicellular, live in colonies |
| cell | tiny unit of living material surrounded by a thin membrane |
| cell division | process where a cell divides into 2 cells |
| cell membrane | a cell’s external boundary for the material inside the cell |
| cell theory | theory that all living things are made of cells |
| cell wall | a rigid structure that provides support for some kinds of cells |
| chlorophyll | a green pigment that absorbs energy from sunlight and uses it to produce food and energy for the plant |
| chloroplast | organelles that contain chlorophyll; organelles in which photosynthesis takes place |
| colony | group of bacteria |
| cytoplasm | a jellylike substance made mostly of water and containing many substances, such as proteins and fats, that are essential to the cell |
| energy | ability to do work |
| life cycle | The cycle that organisms go through of birth, growing to an adult, producing babies, growing old, and then it dies |
| life span | process of birth, growth, reproduction and death |
| meiosis | process where chromosomes duplicate once and cells divide twice |
| microscope | uses lenses to magnify objects |
| mitosis | division process where 2 new cells are created which are identical to the parent cell |
| mitochondria | the cell’s engine; responsible for breaking down the cell’s food and releasing energy |
| nucleus | a large organelle that contains the chromosomes |
| organelles | a tiny structure inside the cytoplasm of most cells that helps carry out the function of the cell |
| organism | a complete living thing |
| photosynthesis | process used by plants to convert sunlight (energy) to a usable source of energy (sugar) |
| protozoan | the more animal-like organisms in the kingdom Protista; able to move around and often live in water |
