Honors Biology

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Across
  1. 3. a relationship in which both species benefit
  2. 4. is the practice of clearing large areas of land to plant a single highly productive crop year after year
  3. 5. pathways of cellular respiration that require oxygen
  4. 6. is any nonliving part of the environment, such as sunlight, heat, precipitation, humidity, and so on
  5. 8. "feed" by chemically breaking down organic matter
  6. 11. describes not only what an organism does but also how it interacts with its biotic and abiotic factors
  7. 12. is a harmful material that can enter the biosphere
  8. 14. a fundamental concept of biology
  9. 16. a portion of the cell outside the nucleus
  10. 20. energy to start reaction
  11. 22. captures light energy and uses it to power chemical reactions that convert carbon dioxide and water into oxygen and energy rich carbohydrates
  12. 23. species the first species to colonize barren areas
  13. 24. Factor is a factor that controls the growth of a population
  14. 25. is the maximum number of individuals of a particular species that a particular environment can support
  15. 26. are located near the nucleus and help organize cell division
  16. 28. the number of males and females of each age a population contains
  17. 29. stimulate the growth and division of cells
  18. 33. resources that cannot be replenished in a reasonable amount of time
  19. 34. are made mostly from carbon and hydrogen atoms
  20. 35. is a large membrane enclosed structure that contains genetic material in the form of DNA
  21. 36. the fluid portion of the chloroplasts, outside the thylakoids
  22. 37. airborne acids that can drift for many kilometers
  23. 38. experiment: when one variable I changed when the others do not change
  24. 39. the general place of where an organism lives
  25. 41. variable: a variable that is deliberately changed
  26. 43. the basic units of life
  27. 44. can be produced or replaced by a healthy ecosystem
  28. 46. the reactants of enzyme-catalyzed reaction
  29. 49. is attraction of the molecule of the same substance
  30. 50. chain is a series of steps in which an organism transfers energy by eating and being eaten
  31. 51. Each step in a food chain or food web
  32. 53. the center of the atom
  33. 54. is a special kind of wetland, formed when a river meets a sea
Down
  1. 1. the zone where photosynthesis cannot occur
  2. 2. the nutrient whose supply limits productivity
  3. 7. is a process of programed cell death
  4. 8. loss of forests
  5. 9. is a particular point of view viewed in a personal way
  6. 10. the first set of reactions in cellular respiration
  7. 13. are small organelles filled with enzymes
  8. 15. "without air"
  9. 17. is the amount of energy needed to raise the temperature of 1 gram of water 1 degree Celsius
  10. 18. cancer cells form a mass of cells
  11. 19. when ecosystems spilt
  12. 21. is any living part of the environment with which an organism might interact, including animals, plants, mushrooms, and bacteria
  13. 27. are the first producers of energy-rich compounds that are later used by other organisms
  14. 30. living together
  15. 31. is the process that releases energy from food in the presence of oxygen
  16. 32. which means "living planet"
  17. 40. is the diffusion of water through selectively permeable membrane
  18. 42. is the day to day conditions of Earth's atmosphere
  19. 45. is the total number of all the genetically based variation in all the organisms in the biosphere
  20. 47. consists of all life on Earth and all the atmosphere
  21. 48. is an organized way of gathering and analyzing evidence about the natural world
  22. 52. light absorbing molecules