(a)[3]
Define the term photosynthesis and outline one reason why it is important to ecosystems.
(b(i))[1]
Identify the green substance plants require for photosynthesis.
(b(ii))[1]
Identify the gas plants need for photosynthesis.
(b(iii))[1]
Identify the gas plants release during photosynthesis.
(c(i))[1]
Use Fig. 4.2 to determine the number of bubbles produced when the lamp was positioned 10 cm from the aquatic plant.
(c(ii))[2]
Describe how changing the distance between the lamp and the aquatic plant affects the rate of photosynthesis.
(c(iii))[1]
Predict how many bubbles would be produced if the lamp were positioned 21 cm from the aquatic plant.
(d)[2]
Suggest a reason for this change.