Practice 9.4 Reproduction in plants with authentic IB Biology exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like cell biology, genetics, and ecology. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Paper
Level
Question 1
HLPaper 1A
Students investigated the environmental factors needed for germination, using seeds from 20 different plant species. Which factors would prevent germination if they are absent?
Question 2
SLPaper 1A
Which of the following conditions is essential for the germination of seeds in most flowering plants?
Question 3
HLPaper 1A
Which organisms have flowers?
Question 4
HLPaper 1A
Which is a function of sucrose in plants?
Question 5
HLPaper 2
1.[3]
The main parts of growing plants are roots, stems and leaves. Draw a plan diagram to show the arrangement of tissues in the stem of a dicotyledonous plant.
2.[3]
Outline the adaptations of plant roots for absorption of mineral ions from the soil.
3.[6]
Photosynthesis and transpiration occur in leaves. Explain how temperature affects these processes.
Question 6
HLPaper 2
The image shows human red blood cells. 
1.[1]
Outline what will happen to human red blood cells if transferred to distilled water.
2.[1]
Stem cells can be used to treat Stargardt's disease. State one other condition treated using stem cells.
3.[3]
Explain the propagation of nerve impulses along the membrane of a neuron.
Question 7
HLPaper 1A
Which type of light is least useful for photosynthesis in terrestrial plants?
Question 8
HLPaper 1A
A pollen tube grows down the style to an egg inside the ovary of a flower. What is the next process that occurs?
Question 9
HLPaper 1A
Chrysanthemums are an important commercial flower. As a short-day plant, how can growers induce chrysanthemums to flower out of season?
Question 10
HLPaper 1A
Where are complex carbohydrates made in the chloroplast?