IMO Practice Test — Plants Around Us
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
A plant is given water but kept in complete darkness. It will most likely…
Become weak because it cannot make food
Grow tall and strong
Make lots of fruit
Turn into a tree quickly
Explanation: Without light, leaves cannot make food, so the plant weakens.
Question 2 of 6
medium
A potato grows under the ground. Which part of the plant do we eat as a potato?
An underground stem
A flower
A fruit
A petal
Explanation: A potato is a special underground stem that stores food.
Question 3 of 6
medium
Two seeds are planted. One gets water and sunlight, the other gets none. Which grows?
The one with nothing
The one with water and sunlight
Both the same
Neither ever grows
Explanation: A seed needs water and warmth to grow; the cared-for seed grows.
Question 4 of 6
hard
If a plant had no roots, what would happen?
It could not drink water or stand
It would grow faster
It would fly
Nothing would change
Explanation: Without roots the plant could not drink water or hold itself up.
Question 5 of 6
medium
A plant makes baby plants from…
Plastic
Stones
Seeds
Glass
Explanation: New plants grow from seeds.
Question 6 of 6
medium
Why do we keep house plants near a window?
To stop them growing
To keep them cold
To hide them
To give them sunlight
Explanation: A window lets in sunlight, which plants need to make food.