Question

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Other sea urchins

Should not have chosen

Small fish

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Sea cucumbers

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Selected

Algae

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Question

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Dome

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Pentamerous

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Toothpick

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Selected

Porcupine

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Question

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Nose

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Selected

Spine

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Feet

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Mouth

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Because sea urchins have large numbers of relatively big eggs

Should have chosen

Because the eggs make great omlettes

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Because a sea urchin's egg is relatively big

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Because sea urchins have large numbers of eggs

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Question

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Intertidal area only

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Both intertidal area and subtidal areas

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On the beach

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Subtidal area only

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Question

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Animalia

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Purpuratus

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Selected

Strongylocentrotus

Should not have chosen

Echinoderms

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