Interactions Among Living Things

3. In the _________ of plants, light energy is absorbed and used to make food.
4. An animal that eats another animal is called a _________.
6. In a ____________, there is a relationship between two organisms where one organism is harming the other organism.
7. A food _____ diagram shows the complex feeding relationships in an ecosystem.
9. A _________ succession usually starts out with bare rock.
10. To survive, animals that live in the same area are in ___________ for food, water, shelter, and space.
11. The plant structure that carries food from its source to the rest of the plant.
12. This is a relationship between two organisms where one organism benefits and the other organism is neither helped nor harmed.
14. Protists, earthworms, and fungi are types of ____________ because they eat and break down dead plant and animal matierals.
16. This is a product of photosynthesis.
17. Different ____________ often compete for the same sources of food.
19. A limiting factor is something that can limit the _____ of a population.
20. 10 percent of energy is passed on to organisms at each higher level in an energy ___________.
21. A __________ succession helps rebuild damaged ecosystems and occurs in places that already have soil.

1. Sun->producer->herbivore->carnivore->decomposer. This list shows a possible order of how energy moves through an ___________.
2. The use of less of a resource to make the supply last longer.
5. To survive and compete in an ecosystem, aniamls have developed many kinds of _____________.
8. This is the death of all the organisms of a species.
12. A wolf is a type of ___________ because it eats other animals.
13. The loss of water through a plant's leaves.
15. A loach, a kind of fish, is a type of _________ because it eats algae in the water.
18. The process of cleaning and restoring a damaged ecosystem.