Across
- 3. An organism that can make its own food.
- 4. used during respiration, a colorless, odorless reactive gas, circulated through living things
- 6. Plants use the sun's energy to convert water and carbon dioxide into sugars
- 7. not beneficial, unfavorable
- 8. Each level in a food chain or food web
- 10. organism that obtains energy from the foods it consumes; also called a consumer
Down
- 1. A gas that is expelled from the body by the respiratory system.
- 2. small organisms that can cause infections in larger organisms
- 5. Microscopic producers in aquatic ecosystems
- 9. a species that no longer has any known living individuals.