Biology  by Bradford
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Unit 7, Natural Selection: grass skirts

55 quick questions across the whole of Unit 7 (a fresh 30 on each print), each answered in a word or two. Print a sheet for each team, a key for the checker and a tick sheet, then tape the sheets to the board and race.

How it runs

  1. SnipA runner cuts one strip off the bottom of their team’s sheet.
  2. Answer as a pairBack at the table, they write the answer on the strip. No books.
  3. Get it checkedThe checker reads it against the key: you, or a student holding it.
  4. Back for the nextA tick earns the next strip. Wrong? Back to the table to try again.

The questions on this sheet

The checker’s key, with every answer, prints with the sheets.
  1. Better-suited variants leave more young
  2. Descent with modification
  3. Reproductive success in an environment
  4. Heritable trait raising fitness
  5. Favors one extreme of a trait range
  6. Favors the average, trimming extremes
  7. Favors both extremes over the middle
  8. Sickle cell carriers resisting malaria
  9. Distant groups gaining similar traits
  10. Humans picking parents for desired traits
  11. Plant bred into broccoli and kale
  12. Ultimate source of new alleles
  13. Chance shifts in allele frequency
  14. Population crash leaving few survivors
  15. Few colonists carry a sample of alleles
  16. Allele movement between populations
  17. All alleles in a population
  18. No evolution: allele frequencies constant
  19. Partners chosen with no preference
  20. Expected share of heterozygotes
  21. Dated remains in rock layers
  22. Aging fossils with isotope half-lives
  23. Intermediate such as Tiktaalik
  24. Human arm and whale flipper bones
  25. Bird and insect wings, for example
  26. Reduced remnant, e.g. whale hip bones
  27. Species from which two lineages descend
  28. Same triplet meanings in nearly all life
  29. DNA little changed across many species
  30. Trait spreading in bacteria after drug use
  31. Insects no longer killed by DDT spray
  32. Branching diagram scaled to time
  33. Branching diagram with no time scale
  34. Spot where one lineage splits in two
  35. A monophyletic group of organisms
  36. Novel feature that defines a clade
  37. Least related taxon, used as reference
  38. Mutation rate used to date splits
  39. Split into groups that can't interbreed
  40. Definition based on fertile interbreeding
  41. Divergence after a geographic split
  42. Divergence with no geographic barrier
  43. Breeding at different times or seasons
  44. Different courtship songs or dances
  45. Postzygotic barrier seen in mules
  46. Having more than two chromosome sets
  47. Long stasis broken by rapid change
  48. Slow, steady change over long periods
  49. Rapid diversification into many niches
  50. Many lineages lost in a short time
  51. Allele variety that buffers a population
  52. Crop of one strain, open to one blight
  53. Sparked gas mix that made amino acids
  54. First genes doubled as catalysts
  55. Lipid-bound droplet that preceded life

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