Across
- 2. factors such as weather and climate affect the population size
- 4. the role that the organism plays in a community
- 9. the relationship where one organism feeds on a host organism
- 13. biology is the study of
- 14. in the body lower the amount of activation energy needed to make a reaction take place
- 15. has a ph lower than 7
- 20. organisms must maintain a stable internal balance known as
- 23. solution is where there is higher concentration of a substance on one side of the membrane than there is on the other
- 24. back and fourth changes between two species that interact
- 26. make proteins
- 27. is made up of a group of organisms of the same species that live together in one place at a time
- 28. makes energy and ATP using sugar
- 30. molecules have charged ends
- 33. the largest population that an environment can support at any given time
- 36. proteins are made up of many chains of
- 38. transport does not require energy
- 43. growth occurs when the numbers of a population increase by a certain factor in each successive period over time
- 44. water molecules retain heat well and help maintain in the body
- 47. bonds are when atoms with two different charges bond together
- 49. breaks down old cell parts
- 50. bonds are when bonds share electrons
- 51. is the change in an ecosystem where one community slowly replaces another community
- 52. eletrons have a charge
- 53. the human population is over and still growing
- 56. is the diffusion of water across a selectively permeable membrane
- 59. carbs and molecules made up of sugars, they supply organisms with
- 60. is the element of life
- 62. cells will communicate with each other using this signal which are recieved by receptor proteins
- 63. the major greenhouse gas in the atmosphere
- 64. the cell membrane is made up of this bilayer which contains phosopholipids
- 65. blocks out harmful ultra violet rays from the sun
Down
- 1. factors such as competition, food supply, disease, and predation can also effect a population size
- 3. group serves as a standard of comparison because the group recieves no experimental treatment
- 5. the greatest threat to the earths many ecosystem is the population
- 6. is a posibble explanation that can be tested by experimentation
- 7. the factors that change as in response to the independent variable
- 8. has a ph lower than 7
- 10. are polluntants which destroy the ozone layer of the atmosphere
- 11. species is a species that is critical to an ecosystem because it effects the survival and number of many other species
- 12. is the movement of molecules from a high concentration to a low concentration
- 16. cells use this to move larg particles out of the cell
- 17. the relationship in which two species live in a close association with eachother
- 18. used for cell support
- 19. packages and ships proteins
- 21. make sugar
- 22. is a place where fresh and salt water mix
- 25. cells do not have a nucleus
- 29. need to eat other consumers for food
- 31. global warming is produced due o the effect
- 32. communities with this are more resilent than others
- 34. is symbiosis where one benefits and the other is not harmed
- 35. the single factor that scientist change in an experiment
- 37. all the species in an ecosystem
- 39. lipids, include fats, steroids, waxes, and oils repel water because they are
- 40. to move large larticles into the cell
- 41. diffusion uses transport proteins to move substances throught the cell membrane
- 42. is the type of symbiosis where both species benefit
- 45. cells have a nucleus surrounded by cytoplasm
- 46. matter is made up of only one type of atom
- 48. producers use to make energy
- 52. is very important because it helps build proteins for the body
- 54. growth occurs when a population starts with a miminum number of individuals and grows until it reaches the carrying capacity of a habitat
- 55. all matter is composed of
- 57. protects DNA
- 58. a place where an organism lives
- 61. is a large region characterized by specific kinds of plants and animals