practical

Question 1

how can we measure the rate of photosynthesis in experiments?

Answer 1

• volume of O2 evolved per minute (bubbles)
• volume of CO2 taken in per unit time (gas syringe/capillary action)
• increase in dry mass per unit time

Question 2

what must be done before comparing the rates of photosynthesis of different plants?

Answer 2

• calculate the rate of photosynthesis per unit time & per unit mass of each of the plants
  or
• calculate the rate of photosynthesis per unit surface area of the leaf

Question 3

what must be taken into consideration before calculating the rate of photosynthesis?

Answer 3

• the rate of respiration!