CAIE IGCSE Biology 14.5.1 Gravitropism
Practise describing gravitropism as directional plant growth towards or away from gravity in roots and shoots.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- define gravitropism as directional growth in response to gravity
- identify roots growing towards gravity as positively gravitropic
- identify shoots growing away from gravity as negatively gravitropic
14.5.1—Gravitropism as a response in which question 1
2,4-D is a synthetic plant auxin that is used as a weedkiller.
Researchers investigated the effectiveness of different treatments of 2,4-D on the control of the weed Conyza canadensis in fields of maize, Zea mays.
The results are shown in Table 5.1.
Table 5.1
Auxin causes the shoots of a plant to grow away from gravity.
State the name of this response.
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