pratical 11

• Set up 4 boiling tubes as per the instructions below:

  •  A: dry cotton wool
  •  B: moist cotton wool
  •  C: boiled and cooled water with a layer of oil on top
  •  D: moist cotton wool

  1. Place 10 cress seeds in each boiling tube.
  2. Place A, B, and C in an incubator, and place D in a fridge.
  3. Leave for a week to allow the seeds to germinate.
  4. Count the number of seeds in each boiling tube that have germinated. Record in a table as

  seen below and compare results.