Biology - Unit One

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Across
  1. 1. mixture of water and nondissolved materials
  2. 3. compound with an amino group on one end and a carboxyl group on the other end
  3. 7. energy needed to get a reaction started
  4. 8. a logical interpretation based on prior knowledge or experience
  5. 9. material composed of two or more elements or compounds that are physically mixed together but not chemically combined
  6. 12. process by which a single parent reproduces by itself
  7. 15. bond formed when one or more electrons are transferred from one atom to another
  8. 16. the variable that is observed and that changes in response to the manipulated variable
  9. 17. single sugar molecule
  10. 19. a slight attraction that develops between the oppositely charged reions of nearby molecules
  11. 20. negatively charged particle; located outside the atomic nucleus
  12. 22. protein that acts as a biological catalyst
  13. 24. formed by the chemical combination of two or more elements in definite proportions
  14. 26. devices that produce magnified images of structures that are too small to see with the unaided eye
  15. 28. compound that forms hydrogen ions (H+) in solution
  16. 29. containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
  17. 32. an organized way of using evidence to learn about the natural world
  18. 35. compound that produces dydroxide ions (OH+) in solution
  19. 37. idea that life could arise from nonliving matter
  20. 38. monomer of mucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
  21. 39. measurement system used to indicate teh concentration of hydrogen ions (H+) in solution
  22. 40. group of cells grown in a nutrient solution from a single original cell
  23. 41. element or compound that enters into a chemical reaction
  24. 43. an experiment in which only one variable is changed at a time
  25. 46. large macromolecule formed from monosaccharides
  26. 48. a signal to which an organism responds
  27. 50. process by which organisms maintain a relatively stable internal environment
  28. 53. technique in which cells are broken into pieces and the different cell parts are separated
  29. 56. well-tested explanation that unifies a broad range of observations
  30. 57. small unit that can join together with other small units to form polymers
  31. 58. atom of an element that has a number of neutrons different from that of other atoms of the same element
  32. 60. information gathered from observations
Down
  1. 1. process by which cells from two different parents unite to produce the first cell of a new organism
  2. 2. a decimal system of measurement whose units are based on certain physical standards adn are scaled on multiples of 10
  3. 4. process that changes one set of chemicals into another set of chemicals
  4. 5. substance that is dissolved in a solvent to make a solution
  5. 6. set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
  6. 10. a proposed scientific explanation for a set of observations
  7. 11. variable that is deliberately changed in a controlled experiment
  8. 13. basic unit of all forms of life
  9. 14. the science that employs the scientific method to study living things
  10. 16. single-stranded mucleic acid that contains the sugar ribose
  11. 18. bond formed by the sharing of electrons between atoms
  12. 21. nucleic acid that contains the sugar deoxyribose
  13. 23. basic unit of matter
  14. 24. microscope that allows light to pass through a specimen and uses two lenses to form an image
  15. 25. the process of gathering information about events or processes in a careful, orderly way
  16. 27. weak acid or base that can react with strong acids or bases to help prevent sharp, sudden changes in pH
  17. 30. attraction between molecules of the same substance
  18. 31. microscope that forms an image by focusing beams of electrons onto a specimen
  19. 33. substance that speeds up the rate of a chemical reaction
  20. 34. large compound formed from combinations of many monomers
  21. 36. smallest unit of most compounds
  22. 39. element or compound produced by a chemical reaction
  23. 42. compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body
  24. 44. the center of the atom which contains the protons and neutrons
  25. 45. atom that has a positive or negative charge
  26. 47. rectant of an enzyme-catalyzed reaction
  27. 49. macromolecule made mainly from carbon and hydrogen atoms; includes fats, oils, and waxes
  28. 51. mixture of two or more substances in which the molecules of the substances are evenly distributed
  29. 52. substance in which a solute is dissolved to form a solution
  30. 54. substance consisting entirely of one type of atom
  31. 55. attraction between molecules of different substances; in plants, attraction between unlike molecules
  32. 59. macromolecule that contains carbon, cydrogen, oxygen, and nitrogen; needed by the body for growth and repair and to make up enzymes