Energy Flow

3. Controls population growth.
5. An organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
6. A person, company, or country that makes, grows, or supplies goods or commodities for sale.
8. Number of individuals of a species that a particular ecosystem can support.
9. Breaks down deasd organisms and wastes to complete nutrients cycle in ecosystem usually bacteria and fungi.
11. The total quantity or weight of organisms in a given area or volume.
13. Feeds on both primary and secondary consumers.
15. Feed mainly of producers.
18. An animal that naturally preys on others.
19. An animal that feeds on plants.
20. An animal hunted and killed by another for food.

1. Feeds mainly on dead material.
2. A member of a large group of unicellular microorganisms lacking organelles and an organized nucleus, including some that can cause disease.
4. Each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy
7. Feeds mainly on primary consumers.
10. A biological community of interacting organisms and their physical environment.
12. Requiring organic compounds of carbon and nitrogen for nourishment
14. A system of interlocking and interdependent food chains.
16. The movement of energy around an ecosystem by biotic and abiotic means
17. Either of two units of heat energy.