| A | B |
|---|
| Flowering plant | plants that produce seeds that are protected by a fruit. |
| Non-flowering plant | Plants that produce unprotected seeds. |
| Egg cell | The female cell that needs to unite with a male cell in order to reproduce. |
| Ovary | The female part of a plant where fruit is produced. |
| Fertilization | The process by which male and female cells unite. |
| Sugar | Photosynthesis produces this and oxygen. |
| Oxygen | The waste gas produced during photosynthesis. |
| Starch | The principle food storage substance of plants. |
| Digestion | The process by which food is changed into useful substances by the body. |
| Circulation | The process by which blood travels through the body. |
| Respiration | The exchange of oxygen and carbon dioxide in the lungs. |
| Skeletal | The body system composed of bones and used for support. |
| Muscular | The body system used for movement. |
| Nervous | The body system which processes all electrical signals. |
| Egg | Female cell used in sexual reproduction |
| Sperm | Male cell used in sexual reproduction. |
| Geologic time | Time span studied by scientists by lookin at rock layers. |
| Fossil | Remnants of an ancient organism preserved in rock. |
| Limb | Appendage of an ancient animal that is similar to appendages of organisms today. |
| Predator | Animal that eats other animals. |
| Prey | Animal that is eaten by other animals. |
| Parasite | Animal that lives off a host organism. |
| Competition | Struggle between living things for water, food, and energy. |
| Symbiosis | Relationship in which an organism lives on, near or in another organism. |
| Competitive relationship | When two or more organisms have to compete for common needs. |
| Natural balance | The point at which eompetition and comsumption of all species is equal. |
| Dependence | The factor in which another organism needs others to survive. |
| Survival | The ability for a species to maintain life. |
| Sunlight | Energy source that all plants need to live. |
| Succession | The order in wlhich an environment changes over time. |
| Climax community | A stable collection of plants, animals, and other organisms in a particular place. |
