B2 H - Sample set 1 Q4
4) A student wanted to investigate the effect of light on the growth of cress seedlings.
The student had three pots of seedlings grown in different conditions.
Pot A was placed in a window with light from one direction only.
Pot B was placed in a cupboard with no light.
Pot C was placed with light from above.
Figure 8 shows the seedlings at the end of the investigation.
(a) (i) Label the pots of cress seedlings A, B and C. (2)
The student had three pots of seedlings grown in different conditions.
Pot A was placed in a window with light from one direction only.
Pot B was placed in a cupboard with no light.
Pot C was placed with light from above.
Figure 8 shows the seedlings at the end of the investigation.
(a) (i) Label the pots of cress seedlings A, B and C. (2)
(ii) What is the response shown by the cress seedlings in Pot A? (1)
(iii) State the plant hormone that causes the cress seedlings to grow towards the light. (1)
(b) The student wanted to find out where the hormone that caused the response to directional light was found.
The student had two growing plant shoots and placed them both in a window with light coming from one direction.
Describe a method the student could use to show that the hormone was found in the tip of the plant shoot. (2)
(c) Figure 9 shows a cross section through a pine leaf.
(b) The student wanted to find out where the hormone that caused the response to directional light was found.
The student had two growing plant shoots and placed them both in a window with light coming from one direction.
Describe a method the student could use to show that the hormone was found in the tip of the plant shoot. (2)
(c) Figure 9 shows a cross section through a pine leaf.
(i) Explain why the waxy cuticle is important for this pine leaf. (2)
(ii) The transport vessels are labelled on Figure 9. Which row of the table is correct for the movement of sucrose through the plant? (1)
(ii) The transport vessels are labelled on Figure 9. Which row of the table is correct for the movement of sucrose through the plant? (1)
(Total for Question 4 = 9 marks)