Topic 4 - Bioenergetics ( 4. investigating photosynthesis rate )

Question 1

what type of pondweed do we use

Answer 1

canadian pondweed

Question 2

what determines the rate of photosynthesis

Answer 2

the rate at which the pondweed produces oxygen corresponds to the rate at which it’s photosynthesising. faster the rate of oxygen production the faster the rate of photosynthesis

Question 3

state how the experiment is carried out

Answer 3

1. the source of light is placed at a specific distance from the pondweed
2. pondweed is left to photosynthesis for a specific amount of time. oxygen released will be collected in the capillary tube.
3. at the end a syringe is used to draw up the amount of oxygen produced. And the volume of o2 can be measured.
4. experiment should be repeated the same 2 times to increase the reliability of results, and then change one of the variables e.g. the light intensity, co2 levels, distance, temperature.