CAIE IGCSE Biology 14.5.3 Investigating Gravitropism & Phototropism
Practise designing and interpreting seedling investigations of root and shoot responses to gravity and directional light.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- describe root and shoot growth directions from seedling or Petri-dish results
- use darkness or uniform light to isolate a response to gravity
- explain that a rotating clinostat prevents gravity acting continuously on one side
14.5.3—Gravitropism and phototropism question 1
The nervous system coordinates the responses of animals to changes in their environment.
Fig. 2.3 shows three pots of seedlings that have been kept in different conditions.
Fig. 2.3
State the conditions in which pots P and Q were kept.
P
Q
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