Biology Revision Crossword

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Across
  1. 3. kingdom, ___________, class, order, family, genus, species
  2. 5. type of variation caused by things other than your genetics
  3. 8. sections of DNA that code for proteins are called __________
  4. 12. proteins are made up of __________ acids
  5. 13. each 3 bases in a DNA base sequence is called a _________
  6. 16. where the DNA is found in a eukaryotic cell
  7. 19. a disease where you only need one copy of the diseased allele is called a ______________ inherited disorder
  8. 21. for the decay of a dead organisms to occur, it must be the right temperature and there must be bacteria and ___________ present
  9. 22. a tightly coiled strand of DNA is called a ________________
  10. 26. each nucleotide in a DNA strand is made up of a sugar, a phosphate and a _______
  11. 27. cells produced by meiosis cell division
  12. 28. the natural process where organisms become adapted to better suit their environment over millions of years
  13. 30. different versions of the same gene are called ______________
  14. 32. type of reproduction that involves only one parent
  15. 34. process where a sperm cell fuses with an egg cell
  16. 36. a binomial name is made up of the species' __________ name and species name put together
  17. 38. bones decay very slowly, and as they decay they become _____________ to form hard rock in the shape of the bone
  18. 39. a change in a DNA base sequence
  19. 40. the male gamete in plants
Down
  1. 1. the parts of the cell that makes the proteins
  2. 2. the level of classification added to the Linnean system by Carl Woese
  3. 4. the reproductive organs of plants are found in their ___________
  4. 6. mutations can occur when cells divide, during DNA _________________
  5. 7. someone who does not have an inherited disease but has the copy of the gene that causes the disease in their genotype is said to be a _____________ of the disease
  6. 9. where all individuals of a species have died
  7. 10. things that make an organism well suited to its environment
  8. 11. Base A only pairs with base T - this is known as _______________ base pairing
  9. 14. the name of the cell that is produced when a sperm cell and egg cell fuse
  10. 15. a disease where you only need one copy of the diseased allele is called a ______________ inherited disorder
  11. 17. the scientific term for 'making proteins' is protein _____________
  12. 18. type of drug used to treat bacterial infections
  13. 20. type of variation that is passed down from parents to their offspring
  14. 23. the remains of dead organisms that lived millions of years ago
  15. 24. two organisms that can reproduce together to produce fertile offspring are said to be members of the same ___________
  16. 25. type of cell division that is used for growth and repair
  17. 29. a key advantage of sexual reproduction
  18. 31. bacteria that are resistant to most antibiotics are referred to as ________________
  19. 33. whether a gene is switched on or off is referred to as gene ________________
  20. 35. the structure of a DNA molecule is referred to as a double __________
  21. 37. a DNA strand is made up of millions of ________________ joined together to form a chain