Biology  by Bradford
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B2.3 Cell specialization: grass skirts

18 quick questions on cell specialization, 11 of them at standard level, 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. Process by which cells become specialized
  2. Self-renewing unspecialized cell
  3. First cell of a new individual
  4. Falls as a cell grows larger
  5. Large, non-motile female gamete
  6. Small, motile male gamete
  7. Adult location such as a hair follicle
  8. Able to form every cell type and placenta
  9. Able to form most, not all, cell types
  10. Able to form only a few related types
  11. Contractile strand inside a muscle fibre
  12. Branched cell with one or two nuclei
  13. Finger-like projections of the membrane
  14. Very thin alveolar cell for diffusion
  15. Alveolar cell that secretes surfactant
  16. Enzyme cap on the head of a sperm
  17. Erythrocyte form, thinner in the middle
  18. Signal whose gradient sets gene expression

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