Across
- 8. relating to or resulting from living things, especially in their ecological relations.
- 10. an organism deriving its nutritional requirements from complex organic substances.
- 11. an animal or person that eats food of both plant and animal origin.
- 12. is the process in which bacteria make food with chemical energy.
- 14. a person or thing that eats or uses something.
- 15. a photosynthetic organism (such as a green plant or a cyanobacterium) that utilizes energy from light to synthesize organic molecules.
- 17. an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.
- 19. an animal that feeds on flesh.
- 20. Chemotrophs are organisms that obtain energy by the oxidation of reduced compounds.
Down
- 1. Primary consumers make up the second trophic level. They are also called herbivores. They eat primary producers—plants or algae—and nothing else.
- 2. an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
- 3. relating to or involved in the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.
- 4. physical rather than biological; not derived from living organisms.
- 5. plankton consisting of microscopic plants.
- 6. an animal which feeds on dead organic material, especially plant detritus.
- 7. a division of microorganisms that are related to the bacteria but are capable of photosynthesis. They are prokaryotic and represent the earliest known form of life on the earth.
- 9. a person, company, or country that makes, grows, or supplies goods or commodities for sale.
- 13. a biological community of interacting organisms and their physical environment.
- 16. an animal that feeds on plants.
- 18. the total quantity or weight of organisms in a given area or volume.