Unit 8 biology

4. the biological influences or living factors that impact an organism within an ecosystem
8. organism that relies on other organisms for its energy and food supply.
9. organism that uses energy from their environment to create their own food.
14. group of populations that live together in the same place at the same time.
16. physical of nonliving factors that shape ecosystems
17. a single step or stage in a food chain or ecological pyramid.
19. group of individuals of the same species living in the same place at the same time.

1. group of organisms so similar they can interbreed and produce fertile offspring.
2. all the organisms that live in a particular area and their nonliving environment
3. a collection of all the ecosystems and biomes present on Earth.
4. the total amount of living tissue within a given trophic level
5. close relationship between 2 species in which 1 benefits and the other is not affected.
6. series of steps that show a single pathway of matter and energy from producer to top consumer.
7. close relationship between 2 species in which 1 benefits and the other is harmed.
10. feeding relationships in which one organism captures and feeds on another.
11. a collection of all the food chains in an ecosystems
12. close relationship between 2 species in which both benefit.
13. any relationship between two organisms that live very closely with one another. Includes mutualism, commensalism, and parasitism.
15. group of ecosystems with the same climate and similar dominant or climax communities.
18. The study of interactions among organisms and their environments.