GSC102 TEST 2 E CAMBRIAN

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7 Terms

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Cambrian snapshot

Gondwana in the south, shallow seas, warm, O₂ lower but rising, the Cambrian Explosion

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More Oxygen, Drivers of the Cambrian Explosion

Larger, more active animals

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Environmental change / new habitats, Drivers of Cambrian Explosion

More ecological opportunities

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Developmental evolution, Drivers of Cambrian Explosion

Greater variety of body plans

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Predator-prey arms races, Drivers of Cambrian Explosion

New defenses and feeding strategies

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What do deep, complex trace fossils show?

Burrowing animals disturbed sediments and changed seafloor habitats

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Why does predation favor hard parts?

Protection from predators