Mollusks quiz
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What group includes octopuses, squid and cuttlefish?
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More questions about Mollusks
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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How does a squid swim at top speed?
Answer: Water jets
Why: Some flying squid jet right out of the sea and glide more than 30 m through the air.
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What makes the Hawaiian bobtail squid glow?
Answer: Bacteria
Why: Every dawn the squid vents about 90% of its glowing bacteria, and the rest multiply back by nightfall.
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Which body part became the cone snail's venom harpoon?
Answer: A tooth
Why: Spare harpoons wait in a sac in the snail's throat, and a fresh one is loaded into its proboscis for each hunt.
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What can an octopus do with its suckers besides grip?
Answer: Taste
Why: The sucker sensors pick up molecules that barely dissolve in water, so an octopus tastes things by touching them.
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Which sea snail shells served as money in Africa and Asia?
Answer: Cowries
Why: The Chinese character 貝, used in words for money and wealth, began as a drawing of a cowrie shell.
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Which spiral best fits a nautilus shell?
Answer: Logarithmic spiral
Why: Across 80 museum shells, the length-to-height ratio averaged about 1.31, well short of the golden ratio's 1.618.
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