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science book vc
| Question | Answer |
|---|---|
| Virus | A tiny particle that can reproduce only inside the cells of living things. |
| Bacteria | Tiny one celled organisms, some of which can cause diseases. |
| Cell | The basic unit of a living organism. |
| Cell membrane | A thin layer that makes up the outside of the cell and controls what enters and leaves it. |
| Nucleus | The cell part that controls the cell's activities. |
| Cytoplasm | Jellylike material that fills most of a cell. |
| Cell wall | A stiff outer layer that helps keep plant cells firm. |
| Chloroplast | The green cell part in plant cells that traps and uses light energy. |
| Classify | To arrange in groups using a system. |
| Kingdom | The largest group into which an organism is classified. |
| Genus | A group of similar species. |
| Species | A group of organisms of only one kind that can interbreed in nature. |
| Invertebrate | An animal that has no backbone. |
| Vertebrate | An animal with a backbone. |
| Mammal | An animal that has hair or fur and feeds its young with milk. |
| Vascular plant | A plant with long tubes inside that carry food and water to all the parts of the plant. |
| Egg cell | A cell that can join with a sperm cell to form a new individual. |
| Sperm cell | A cell that can join with an egg cell to form a new individual. |