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You find two fossils. One is a very primitive organism and the other is a complex organism. Which of these two fossils do you think is the oldest?

User Steve Tjoa
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2 Answers

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Answer: B. The primitive on the left

User HoelR
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The very primitive organism is the oldest because, over time, organisms gradually evolved into more complex organisms. First came the primitive organism, then it evolved into the more complex one, or the younger fossil.
User Alvescleiton
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