Review Crossword

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Across
  1. 3. group that does not receive the independent variable.
  2. 8. _______ cells like bacterial cells are less complex and lack organelles.
  3. 11. a tough layer outside the cell membrane in most cells.
  4. 13. the _____ makes a tough, flexible, waterproof enclosure for a cell.
  5. 18. all _____ things on the planet have DNA with the same basic structure.
  6. 19. group that recieves the independent variable
  7. 21. DNA is very ____.
  8. 23. sugar+________-->ATP+CO2+H2O
  9. 24. created the first model of DNA out of wood and wire.
  10. 25. All the living things that directly or indirectly affect the enviornment.
  11. 26. performed by the creation of proteins
  12. 27. Controls all cell processes.
  13. 30. the process where food and O2 are used to create energy for all cells.
  14. 31. the process by which plants, some bacteria, and protists use sunlight to make glucose.
  15. 33. second step of the scientific method
  16. 37. The living community and physical environment functioning together as an independent and relatively stable system.
  17. 39. sixth step of the scientific method.
  18. 40. it is esitmated that only __ percent of photosynthesis occurs in plants, the rest is done by algae and bacteria.
  19. 41. 1 item at a time that is changed/tested.
  20. 42. all the interacting populations in a given area.
  21. 43. the maximum number of organisms that resources of an area can support.
  22. 46. only _ percent of it is used to code for proteins.
  23. 47. who discovered the bacteria that creates penicillin?
  24. 48. these build structures, such as muscles, parts of cell membranes, feathers, hair, etc.
  25. 49. organisms capable of reproducing to produce fertile offspring
Down
  1. 1. photosynthesis usually occurs using a pigment called ____.
  2. 2. modifies and packages materials
  3. 4. the _____ is made of alternating sugars and phosphates.
  4. 5. Part of the earth where life exists and interact with their enviornment.
  5. 6. we have about 20,000 genes located on our __ chromosomes.
  6. 7. all the members of a species inhabiting a given location
  7. 9. means with oxygen
  8. 10. the stage in which a molecule of glucose is split into two pyruvic acid molecules.
  9. 12. makes energy out of food.
  10. 14. means without oxygen
  11. 15. A large system of membranes, some covered with ribosomes, some covered with no ribosomes.
  12. 16. what does DNA mean?
  13. 17. fifth step of the scientific method
  14. 20. compound that absorbs light.
  15. 22. Those physical and chemical factors(non-living) which affect the ability of organisms to survive and reproduce.
  16. 28. an organism that gets energu by breaking down the remains of dead organisms.
  17. 29. an educated guess based on your research that might answer your question.
  18. 32. thing that is measured in an experiment.
  19. 34. The cell membrane provides _____ and support.
  20. 35. Geographic area classified by communities present characterized by adaptions to a particular climate.
  21. 36. first step of the scientific method
  22. 38. regulates what enters and leaves the cell.
  23. 44. tiny dots that make proteins
  24. 45. a segment of DNA that codes for a protein.