In a photosynthesis experiment with pondweed, light intensity is varied by

  1. adding sodium hydrogencarbonate
  2. changing the distance of the lamp
  3. changing the temperature
  4. changing the plant
Answer

B) changing the distance of the lamp

Intensity ∝ 1/d². AS & A Level Biology · Topic 13 Photosynthesis · 13.2 Investigation of limiting factors

Biology MCQ · More A Level Biology: Photosynthesis MCQs · Practise