Cells Review

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Across
  1. 5. groupings of similar cells
  2. 6. the fluid that fills a cell
  3. 7. letting some (usually very small, uncharged) substances through, but not others
  4. 13. tunnelling microscope a type of electron microscope that uses the quantum-mechanical tunnel effect to study atomic structures and observe single atoms
  5. 14. organisms with cells that contain a distinct nucleus
  6. 15. the outermost layer of cells in plants and animals
  7. 18. a microscope that uses a beam of electrons instead of light to obtain the
  8. 19. so that any differences observed must be due to the variable being tested
  9. 20. requires electrons to pass through very fine slices of tissue
  10. 24. diffusion of water through a semipermeable membrane from a dilute solution to a concentrated solution until there is an equal concentration of fluid onboth sides of the membrane
  11. 25. small structures inside eukaryote cells
  12. 27. a person who studies the branch of
  13. 28. a microscope that is built from two or more lenses, one of which is in the single eyepiece. It is used to magnify very small objects such as a drop of water or a very
  14. 29. a very thin piece of glass that is used to cover a specimen on a microscope slide
  15. 32. a complex structure in a large organism, such as an eye, wing or leaf, that performs a specific function
  16. 34. organisms built from more than one cell
  17. 37. the stiff outside layer of a plant cell
  18. 38. the chemical reaction in which carbon dioxide and water are converted into
  19. 39. slice of tissue.
  20. 40. caused by loss of water through osmosis
Down
  1. 1. organisms whose cells do not have a nucleus
  2. 2. that deals with microorganisms
  3. 3. the outer skin of a plant or animal cell
  4. 4. to become widely dispersed; spread out
  5. 7. involves electrons interacting only with the surface of the object being viewed
  6. 8. glucose and oxygen. This process requires chlorophyll and sunlight. It occurs within the cells that are present in the chloroplasts of plant leaves.
  7. 9. the organelles found in plant cells in which photosynthesis occurs
  8. 10. a factor in an experiment that may affect the results and that can be changed
  9. 11. a process in which chloroplasts and other organelles can move around the cytoplasm of living cells
  10. 12. within the cell, growth and reproduction
  11. 16. and can magnify things up to a million times. Transmission electron microscopes and scanning electron microscopes are the two main types.
  12. 17. test a test in which the effect of one variable is tested and all other variables are kept the
  13. 21. a large, membrane-bound structure that controls a living cell, including chemical
  14. 22. shrinkage or contraction of the cytoplasm away from the wall of a living
  15. 23. a fluid-filled cavity in the cytoplasm of plant cells
  16. 26. organisms organisms that consist of a single cell
  17. 30. the process in which nutrients are converted into useful energy in a cell
  18. 31. a process in which sugars are converted to alcohol and carbon dioxide by organisms such as yeast to obtain their energy
  19. 33. the building blocks of living things
  20. 34. (singular: mitochondrion)an organelle that supplies the cell with energy
  21. 35. repeat trials of experimental tests, to reduce random sampling errors
  22. 36. their effects on other living organisms