IMO Practice Test — Kinds of Plants
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
medium
A hibiscus plant is bushy with many woody stems near the ground. It is a…
Herb
Tree
Shrub
Climber
Explanation: Bushy, many-stemmed plants are shrubs.
Question 2 of 6
hard
A coconut tree and a tulsi plant differ mostly in their…
Size and stem strength
Colour
Smell
Number of leaves
Explanation: Trees are big and woody; herbs are small and soft.
Question 3 of 6
hard
Why are most herbs grown afresh each season?
They are made of wood
They have short lives with soft stems
They never die
They are very tall
Explanation: Soft-stemmed herbs are short-lived and re-grown.
Question 4 of 6
medium
How do plants help keep our air clean?
They make smoke
They take in bad air and give out oxygen
They eat dust only
They do nothing
Explanation: Plants take in carbon dioxide and give out oxygen.
Question 5 of 6
hard
A potted plant's leaves are turning yellow and drooping. It most likely needs…
More darkness
Water and sunlight
Less air
A bigger pot only
Explanation: Yellow, drooping leaves often mean it needs water and light.
Question 6 of 6
hard
A pea plant climbs using tiny curling threads called…
Petals
Roots
Tendrils
Trunks
Explanation: Tendrils help climbers hold on and rise.