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Across 4. general explanation for a broad range of data 6. nucleotides are the building blocks of these C-based molecules 7. smallest basic unit of matter 8. cell wall of fungi is made of this 12. organelle that has its own DNA 14. he said all matter is made of indivisible particles 16. these structures make up the cell membrane 18. structure that makes ribosomes 20. passive transport of materials that does not use ATP but does use transport proteins 23. maintenance of constant internal conditions in an organism 28. long, hollow tube3 that act as tracks for the movement of organelles 32. he discovered the electron 33. organelle that breaks down worn out cells 34. he said an atom is mostly empty space with a tiny dense nucleus 36. bonds found between amino acids in a protein 38. word that means "self-eating" 40. can be attached to ER or floating in cytoplasm 42. attraction between like particles 43. attraction between unlike particles 44. fats, oil, waxes 46. part of phospholipid that is nonpolar 47. fluid portion of cytoplasm 48. structure contains instructions for making proteins 51. substance that reduces activation energy 52. formed when at atom gains or loses an electron 53. a catalyst in living things 54. water is an example of this type of molecule because eit has a negative ad a positive en 55. knowledge obtained by observing natural events and condition to discover facts 56. ability to cause a change or to do work 57. part of a research project that has no value, but appears like the other 58. organelle that make lipids and aid sin breaking down drugs or alcohol

Down 1. he tracked thousands of Darwin's finches and demonstrated that natural selection is occurring 2. describes the ability of the cell membrane to move and flow 3. variety of organisms in a given area 5. reactions that absorb energy 8. type of bond in which molecules share pairs of electrons 9. research project in which neither the researchers or subjects know who has the placebo 10. an inherited trait that gives an advantage to individual organisms 11. exactness of a measurement 13. tiny threads that enable cell to move and divide 15. structure in the CM that strengthens the membrane 17. study and comparison of genomes both within and across the species 19. type of fat that has the maximum number of H atoms possible, only C-C single bonds 21. passive transport of materials that does not use ATP or transport proteins 22. jelly=like substance that contains the organelles 24. all living things and the places they are found 25. cell type without a nucleus and membrane bound organelles 26. study of living things and the places they are found 27. change in living things over time 29. he outlined the scientific method and published it 30. an organized group of related parts that interact to form a whole 31. organelle that is able to divide materials from the rest of the cytoplasm and transport them 35. he was a naturalist on the HMS Beagle and observed finches 37. subatomic particle that determines the properties of an element 39. he was the first to explain biological phenomena in terms of natural causes 41. action of imitating something else or resembling another plant or animal 44. the interior of the ER, aids in production of proteins and lipids 45. carbon-based group that is used to build and repair tissues 49. he was involved in the first liver transplant in 1963 50. he was a Dutch eyeglass maker that invented the compound microscope