2021 Paper 1

• suggest two ways the student could improve the quality of his scientific drawing of the blood vessels in this dissection

  1. Only use single lines/do not use sketching (lines)/ensure lines are continuous/connected
  2. Add labels/annotations/title
  3. Add magnification/scale (bar)
  4. Draw all parts to same scale/relative size
  5. Do not use shading/hatching;
• Suggest one reason why scientists used a data logger AND explain why this was important in this investigation

  1. To increase accuracy/resolution because differences/lengths are small
  2. 2. To increase accuracy because reduces risk of human error
  3. To increase accuracy because roots are less (likely to be) damaged
  4. To reduce error/uncertainty because differences/lengths are small;
• Although these populations are completely separate and show genetic variation, they are both called Helianthus annuus.

  Explain why

  • SAME SPECIES
  • If MATED CAN PRODUCE FERTILE OFFSPRINGS
  • It is genus and species name