IMO Practice Test — Adaptations: Built to Survive
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
Why would a polar bear's white fur be a poor adaptation in a green forest?
It is too soft
It is too warm
It is too heavy
It would stand out instead of hiding
Explanation: White fur hides in snow but stands out in a green forest.
Question 2 of 6
hard
Why is a camel's thick fur on top but thin underneath a clever desert design?
Top fur blocks Sun heat; thin belly lets heat escape
It looks nice
It stores water
It helps swimming
Explanation: This fur pattern shields from Sun yet lets body heat out.
Question 3 of 6
hard
A fish that floats up and down by filling a tiny air bag inside is using its…
Eyes
Tail only
Air bladder
Scales
Explanation: A fish controls its depth with an air bladder.
Question 4 of 6
hard
A dolphin lives in water but comes up to breathe air. This shows a dolphin breathes with…
Fins
Gills
Skin only
Lungs, not gills
Explanation: Dolphins are not fish — they breathe air with lungs.
Question 5 of 6
hard
Floating water plants have air spaces in their leaves and stems to help them…
Sink
Stay afloat on water
Burn
Fly
Explanation: Trapped air keeps water plants floating.
Question 6 of 6
hard
Penguins huddle together in big groups in the cold mainly to…
Find food
Play games
Share warmth and stay warm
Look bigger
Explanation: Huddling shares body heat to fight the cold.