Few fossils of the earliest animals still exist because they a. had hard shells that broke down easily, leaving no trace. b. we’re large and likely to be eaten by others after they died. c. we’re soft bodied and tiny, therefore unlikely to fossilize. d. lived only in volcanic regions and were destroyed by lava flows.
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Few fossils of the earliest animals still exist because they a. had hard shells that broke down easi...
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