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Course: Middle school biology - NGSS  > Unit 8

Lesson 2: The fossil record
Science
Middle school biology - NGSS
Evolution
The fossil record
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Apply: the fossil record

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Problem

The diagram below shows fossils in three undisturbed layers of sedimentary rock.
A diagram shows three rock layers. The top layer is labeled shallower. The bottom layer is labeled deeper. The top rock layer contains a fern fossil. The middle layer contains a shell fossil. The bottom layer contains a coral fossil.
Which fossil in the diagram is the OLDEST?
Choose 1 answer: