1. Ecology & the Environment

2. Study of the interactions that take place among organisms and their environment. Chapter 20

3. Ecology

4. Living parts of the environment; plants animals & microorganisms Chapter 20

5. Biotic

6. Non-living parts of the environment; water, air, light, rocks Chapter 20

7. Abiotic

8. Organism that cannot create energy-rich molecules (glucose) but obtains its food by eating other organisms Chapter 20

9. Consumer

10. An organism, such as a plant or alga, which produces glucose from carbon dioxide by photosynthesis and is a source of food for other organisms Chapter 20

11. Producer

12. Animals who hunt and eat other animals; meat eater Chapter 20

13. Carnivore

14. An organism that eats both plants and animals Chapter 20

15. Omnivore

16. An animal that eats plants Chapter 20

17. Herbivore

18. The relationship between plants and animals that shows who eats what. Energy is transferred from one organism to another through the food chain Chapter 20

19. Food Chain

20. A model of feeding relationships, describing the connections among all food chains within an ecosystem Chapter 20

21. Food Web

22. A representation of the loss of useful energy at each step in a food chain Chapter 20

23. Energy Pyramid

24. Based on the number of organisms needed to make a simple food chain. Shows how large populations of certain organisms are needed to support very small populations of other organisms. Chapter 20

25. Pyramid of Numbers

26. An interactive association between two or more species living together; may be parasitic, commensal, or mutualistic. The relationship between two organisms Chapter 20

27. Symbiosis

28. A symbiotic relationship in which one species benefits and the other is not affected Chapter 20

29. Commensalism

30. A form of symbiosis in which the population of one species benefits at the expense of the population of another species Chapter 20

31. Parasitism

32. A symbiotic interaction between two species in which both derive some benefit Chapter 20

33. Mutualism

34. One of the biological interactions that can limit population growth; occurs when two species vie with each other for the same resource Chapter 20

35. Competition

36. All the organisms that belong to the same species living in a community Chapter 20

37. Population

38. All the populations of different species that live in an ecosystem Chapter 20

39. Community

40. Place where an organism lives and that provides the types of food, shelter, moisture, and temperature needed for survival Chapter 20

41. Habitat

42. An organism’s place in the ecosystem: where it lives, what it consumes, what consumes it, and how it interacts with all biotic and abiotic factors. A unique ecological role of an organism in a community. Chapter 20

43. Niche

44. Any living thing Chapter 20

45. Organism

46. Part of Earth that supports life, including the top portion of Earth's crust, the atmosphere, and all the water on Earth's surface Chapter 20

47. Biosphere

48. All the living organisms that live in an area and the nonliving features of their environment Chapter 20

49. Ecosystem

50. Anything that can restrict the size of a population, including living and nonliving features of an ecosystem, such as predators or drought Chapter 20

51. Limiting Factor

52. Largest number of individuals of a particular species that an ecosystem can support over time Chapter 20

53. Carrying Capacity

54. The maximum reproductive rate of an organism, given unlimited resources and ideal environmental conditions Chapter 20

55. Biotic Potential

56. Growth of a population without any constraints; therefore, the population will grow at an ever-increasing rate Chapter 20

57. Exponential Growth

58. The chemical reaction in which green plants combine water and carbon dioxide in the presence of sunlight to form glucose and oxygen Chapter 20

59. Photosynthesis

60. An animal that kills and eats other animals Chapter 20

61. Predator

62. An animal that is killed and eaten by another animal Chapter 20

63. Prey