Unit 8 biology

1. close relationship between 2 species in which both benefit.
5. group of individuals of the same species living in the same place at the same time.
6. The study of interactions among organisms and their environments.
9. a single step or stage in a food chain or ecological pyramid.
13. the biological influences or living factors that impact an organism within an ecosystem
16. all the organisms that live in a particular area and their nonliving environment
17. a collection of all the food chains in an ecosystems
19. organism that relies on other organisms for its energy and food supply.
20. any relationship between two organisms that live very closely with one another. Includes mutualism, commensalism, and parasitism.
21. feeding relationships in which one organism captures and feeds on another.

2. organism that uses energy from their environment to create their own food.
3. group of organisms so similar they can interbreed and produce fertile offspring.
4. group of populations that live together in the same place at the same time.
7. group of ecosystems with the same climate and similar dominant or climax communities.
8. organisms that obtains energy by eating only plants.
10. a collection of all the ecosystems and biomes present on Earth.
11. the total amount of living tissue within a given trophic level
12. close relationship between 2 species in which 1 benefits and the other is harmed.
14. physical of nonliving factors that shape ecosystems
15. series of steps that show a single pathway of matter and energy from producer to top consumer.
18. close relationship between 2 species in which 1 benefits and the other is not affected.