Chapter 1 Quiz 🌱
Plant System · 10 MCQ + 5 Open-Ended
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✏️ Section B — Open-Ended Questions
Write your answer first, then reveal the model answer to check.
Q11
The cucumber plant has a weak stem that climbs around a support. How is this useful to the plant? [2]
Winding around a support lifts the stem and pushes the leaves higher up, where they can capture more sunlight to make food for the plant.
Q12
In the water-uptake experiment, Beaker A has a plant and Beaker B has no plant. Explain why Beaker B is needed. [2]
Beaker B is the control set-up. It acts as a baseline so results from Beaker A can be compared against it. This confirms that the falling water level in Beaker A is caused by the roots drawing in water — and nothing else.
Q13
A student says: “The cactus does not have leaves, so it cannot make food.” Do you agree? Explain. [2]
I disagree. A cactus does have leaves — they are just shaped like spines. Because these leaves cannot make food, the cactus uses its green stem to carry out that role instead.
Q14
Describe TWO ways in which the roots of a mangrove tree differ from the roots of a large tree growing in soil. [2]
- Mangrove roots arch above the ground, while a large tree’s roots grow underground.
- Mangrove roots support the tree in soft, wet soil, whereas a large tree’s roots are thick, tough and strong, gripping firmly into hard soil.
Q15
Explain why leaves are important to a plant. Give TWO reasons. [2]
- Leaves make food for the plant — they contain chlorophyll which absorbs sunlight for photosynthesis.
- Leaves have tiny openings that allow the plant to exchange gases with the surroundings.