4.1 - SPECIMEN SET B1 Q2 Answers
2) Plants absorb light to photosynthesise.
2.1) What is the correct word equation for photosynthesis? [1 mark]
Tick one box.
2.1) What is the correct word equation for photosynthesis? [1 mark]
Tick one box.
2.2) Figure 2 shows some of the apparatus that can be used to measure the rate of photosynthesis.
The rate of photosynthesis in the pondweed is affected by different colours of light.
Describe a method you could use to investigate this.
You should include:
Describe a method you could use to investigate this.
You should include:
- what you would measure
- variables you would control. [6 marks]
2.3) A scientist carried out a similar investigation. Her results are shown in Figure 3.
The scientist said:
‘Light stops being a limiting factor at a light intensity of 20 units.’
Give evidence from Figure 3 to support this statement. [1 mark]
2.4) What could be limiting the rate of photosynthesis at a light intensity of 25 units?
Give one factor. [1 mark]
(Total for Question 2 = 9 marks)
The scientist said:
‘Light stops being a limiting factor at a light intensity of 20 units.’
Give evidence from Figure 3 to support this statement. [1 mark]
2.4) What could be limiting the rate of photosynthesis at a light intensity of 25 units?
Give one factor. [1 mark]
(Total for Question 2 = 9 marks)
Answers
