Page 13 - Biology_Form_3

Biology for Secondary Schools

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(a) (b)
Experimental set Control set
Figure 1.2: Experiment result of phototropism in shoots
Conclusion
(a) Compare Figure 1.2 above with what you have observed.
(b) Provide a conclusion for your experiment.

Questions

1. Explain the changes that take place in the shoot.

2. What is the significance of such growth in plants?
3. Write a report about the findings from the experiment

Experiment 1.2

Investigating the effect of light on plant seedling roots
Aim: Investigation of phototropism in roots
Materials
Four bean seeds, one cardboard box, cotton wool, dish and source of light

Procedure
1. Place four bean seeds on wet cotton wool in a dish placed in a cardboard with a
window cut on one side which allows light to reach the bean seeds in only one
direction.

2. Leave them for seven days to allow them to germinate. Then remove the cardboard
carefully.
3. Observe the changes in the developing roots and shoots.

6 Student’s Book - Form Three

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BIOLOGY FORM 3 FINAL EDITED 16.09.2025.indd 6 KAMISHNA 23/10/2025 11:52:28 KAMISHNA