IB Biology HL 3.1.19 Phytohormones Question Bank
Practise IB Biology HL 3.1.19 by applying phytohormones concepts to exam-style questions.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- identify the relevant biological structure, process or evidence
- apply the correct biological mechanism to the question
- evaluate the result using data, adaptation or ecological reasoning
C3.1.19 (HL)—Phytohormones question 1
(a) Explain how the pressure potential and solute potential change inside a plant root cell when it is placed into a solution that is more hypotonic than the cell's cytoplasm.
The photograph shows a seedling (young plant) of the family Fabaceae. The shoot and roots have been labelled.
State the name and site of production of two phytohormones that regulate the growth of seedlings.
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