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3-question preview

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Answer easy, medium, and hard questions. Install the app for the full 18-question duel.

Question 1 of 3 Easy

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1 Easy

Which male marine animal carries and gives birth to its young?

Answer: seahorse
2 Medium

Which shark species can survive in both salt and fresh water?

Answer: Bull shark
3 Hard

Which marine mammal is nicknamed the "canary of the sea"?

Answer: Beluga whale
4 Easy

How many arms do most species of starfish have?

Answer: Five
5 Medium

How does the immortal jellyfish escape death from old age?

Answer: it reverts to childhood
6 Hard

Approximately how many years can a giant clam live?

Answer: 100 years