Reproduction Chronology
Exam 16.3.26 · Sequencing & Linking Events · Paper 2 / 4 / 6
15
Questions
36
Total Marks
3
Sections
Section A
Order of Events
5 questions
Section B
Distinguishing Events
5 questions
Section C
Post-Fertilisation to Germination
5 questions
Place the following events in the correct chronological order, starting with the earliest: Fertilisation, Germination, Pollination, Pollen tube growth.
Which event occurs immediately AFTER pollen is successfully deposited on a compatible stigma? A. Germination of the seed B. Growth of a pollen tube C. Formation of the embryo D. Dispersal of fruits
A student lists these events in a flower's life cycle: (i) Ovule develops into a seed, (ii) Pollen transferred to stigma, (iii) Male and female nuclei fuse, (iv) Fruit wall develops from the ovary wall, (v) Pollen tube grows through the style. Arrange events (i)–(v) in the correct order.
Which row correctly links the event to the structure it transforms? A. Fertilisation → Ovary wall becomes seed B. Fertilisation → Ovule becomes fruit C. Fertilisation → Ovule becomes seed D. Fertilisation → Stigma becomes seed
A seed has been dispersed and is now in suitable soil. Place the following post-dispersal events in the correct sequence: Root emerges from seed coat, Shoot emerges and grows toward light, Seed absorbs water and swells, Seed coat splits.
State the difference between pollination and fertilisation.
Explain how self-pollination and cross-pollination differ. State one genetic consequence of each.
Compare insect pollination and wind pollination. For each, state TWO features of the pollen and ONE feature of the stigma that suit the pollination method.
Distinguish between a seed and a fruit. Include the origin of each structure after fertilisation.
A student states: 'Fertilisation occurs when pollen lands on the stigma.' Identify the error in this statement and write a corrected version.
After fertilisation, a seed is formed. State THREE environmental conditions that the seed will require in order to germinate successfully.
A student investigates the effect of temperature on the germination rate of mung bean seeds. She sets up five identical containers, each with 20 seeds on damp cotton wool, at temperatures: 5°C, 15°C, 25°C, 35°C, and 45°C. She counts the number of seeds germinated after 5 days. (a) State the independent variable and dependent variable. (b) State TWO variables that must be kept constant. (c) Predict the result at 5°C and explain your prediction.
Describe the role of the cotyledon in a seed, and explain why a germinating seedling does not need light during the first few days after germination.
A student wants to test whether oxygen is necessary for seed germination. She has two sets of 20 mung bean seeds on damp cotton wool. (a) Describe how she could create an oxygen-free environment for one set of seeds. (b) State the expected result if oxygen IS necessary for germination. (c) Suggest ONE source of error in this investigation and how it could be reduced.
Explain the importance of seed dispersal for the survival of a plant species. In your answer, refer to competition and genetic variation.
Cambridge IGCSE Biology 0610 · Topic 16.3 · GenZStudi
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