IMO Practice Test — Plants: Life & Growth
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
A green plant both makes food by day and, like us, also takes in oxygen to…
Sleep
Breathe (respire)
Fly
Freeze
Explanation: Plants respire too, taking in oxygen to release energy.
Question 2 of 6
hard
Wind-pollinated flowers often have light, dry pollen and are usually…
Full of nectar
Very bright and scented
Dull and not scented
Closed tight
Explanation: Wind flowers need no bright colour or scent to attract insects.
Question 3 of 6
hard
A seed with a tasty fruit around it is most likely spread by…
Animals that eat the fruit
Magnets
Electric wires
Sound waves
Explanation: Animals eat the fruit and spread the seeds inside.
Question 4 of 6
hard
Why do many flowers have a sweet smell and nectar?
To make seeds heavy
To taste nice
To scare birds
To attract insects that help pollination
Explanation: Scent and nectar draw insects that carry pollen.
Question 5 of 6
hard
If all the bees disappeared, many plants would make far fewer fruits because pollination would be…
Unchanged
Faster
Reduced
Easier
Explanation: Fewer pollinators means much less pollination and fewer fruits.
Question 6 of 6
hard
A pea pod is a fruit, and the peas inside it are the…
Leaves
Petals
Roots
Seeds
Explanation: Peas are the seeds inside the pod fruit.