Across
- 2. The largest population size an environment can support over time.
- 5. The movement of nitrogen through the atmosphere, soil, and living organisms.
- 7. An organelle in plant cells where photosynthesis takes place.
- 11. A symbiotic relationship in which one organism benefits while the other is harmed.
- 13. A living part of an ecosystem that affects other organisms.
- 14. Cellular respiration that requires oxygen to release energy from glucose.
- 15. The use of resources in ways that meet current needs without harming future generations.
- 19. The movement of carbon through living organisms and the environment.
- 20. A close relationship between two different species living together.
- 23. Any factor that restricts the size of a population.
- 24. A simple sugar produced during photosynthesis that cells use for energy.
- 26. An organism that breaks down dead organisms and wastes, returning nutrients to the environment.
- 29. A molecule that stores and transfers energy for cell activities.
- 31. An organism that hunts and eats another organism.
- 32. A model that shows how energy moves from one organism to another in an ecosystem.
- 33. The farming practice of growing only one type of crop over a large area.
- 35. A community of organisms and their physical environment interacting together.
- 37. The maintenance of stable internal conditions in an organism.
- 38. An organism that makes its own food and forms the base of a food chain.
- 40. An organism that makes its own food using energy from sunlight or chemicals.
- 42. A symbiotic relationship in which one organism benefits and the other is unaffected.
- 43. The movement and reuse of matter through living and nonliving parts of ecosystems.
- 44. A group of organisms of the same species living in the same area.
- 45. All the different populations living and interacting in an area.
- 46. The process by which plants and some other organisms use sunlight, water, and carbon dioxide to make glucose and oxygen.
Down
- 1. The process cells use to break down glucose to release usable energy in the form of ATP.
- 3. The process in which organisms with beneficial traits are more likely to survive and reproduce.
- 4. Organelles that release energy from food during cellular respiration.
- 6. Differences in DNA among individuals in a population.
- 7. An organism that obtains energy by eating other organisms.
- 8. The position an organism occupies in a food chain or food web.
- 9. An anaerobic process that releases a small amount of energy without oxygen.
- 10. An organism that gets energy by consuming other organisms.
- 12. The variety of living organisms in an ecosystem.
- 16. A nonnative species that spreads rapidly and harms ecosystems.
- 17. The practice of growing crops and raising animals for food and other products.
- 18. An organism that is hunted and eaten by another organism.
- 21. The total mass of living material in a given area or trophic level.
- 22. The movement of energy through an ecosystem from producers to consumers and decomposers.
- 25. A nonliving part of an ecosystem, such as sunlight, water, or temperature.
- 27. The struggle between organisms for limited resources such as food, water, or space.
- 28. The release of energy from food without using oxygen.
- 30. A symbiotic relationship in which both organisms benefit.
- 34. A diagram that shows the amount of available energy at each trophic level.
- 36. A biological process that helps maintain stability by responding to changes in the environment.
- 39. A model showing the many interconnected food chains in an ecosystem.
- 41. An inherited trait that increases an organism’s chance of survival and reproduction.