Biology Review

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Across
  1. 3. nucleic acid that consists of a long chain of nucleotides
  2. 5. receives oxygen poor blood
  3. 12. a hollow, muscular organ that pumps blood around the body
  4. 13. a hollow ball of cells
  5. 15. is made continuously from one primer (2 words)
  6. 18. eat other animals
  7. 19. have three chamber heart: two atria, one ventricle
  8. 21. many aquatic invertebrates and most aquatic chordates exchange gases through
  9. 22. heart or heart like organs forces blood through
  10. 23. insertion and deletion are also know as (2 words)
  11. 25. untwists the double helix and exposes complementary strands
  12. 27. digest food inside specialized cells that pass nutrients to other cells by diffusion (2 words)
  13. 31. have a four chamber heart that are actually two separate pumps working next to one another
  14. 32. making RNA from a sequence of DNA bases
  15. 34. these animals exhibit four characteristics during at least one stage of life
  16. 35. after proteins are built they transfer each amino acid to the ribosome
  17. 38. the decoding of mRNA into protein
  18. 39. occurs in the nucleus of eukaryotes & cytoplasm of prokaryotes (2 words)
  19. 42. reverses direction of parts of a chromosome
  20. 43. RNA contains A, C, G, U, which are letters of a language called (2 words)
  21. 44. genes carry instructions from DNA for assembling amino acids into protein
  22. 45. one base is changed to a different base
  23. 46. outermost layer, produces organs, nerves, and the outer layer of skin
Down
  1. 1. proteins are built on ribosomes
  2. 2. the process of change overtime
  3. 4. natural selection occurs through this (4 words)
  4. 6. pre-mRNA molecules have small pieces that are cut out and discarded
  5. 7. in RNA the sugar is this instead of deoxyribose
  6. 8. structures that concentrate waste and add them to digest wastes (2 words)
  7. 9. eat plants or parts of plants
  8. 10. heritable changes in genetic information
  9. 11. is assembled in segments created from many primers (2 words)
  10. 14. only works in one direction (2 words)
  11. 16. digest food in a tube which had two openings (2 words)
  12. 17. include skin, mantle cavities, book lungs, and tracheal tubes (2 words)
  13. 20. one specific amino acid
  14. 24. organs that exchange oxygen and carbon dioxide between blood and air
  15. 26. land vertebrates use these to get rid of ammonia
  16. 28. begins or continues in a stomach that secretes digestive enzymes (2 words)
  17. 29. obtain extra nutrients from the bacteria
  18. 30. father of evolution
  19. 33. part of a chromosome breaks off and attaches to another
  20. 36. land invertebrates produce urine in
  21. 37. animals remove ammonia waste through the process of
  22. 40. spongy cavities
  23. 41. pumps blood out oxygen rich blood
  24. 45. possible three-base codons in the genetic code (2 words)