Middle School Life Science Quiz
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BIOLOGICAL EVOLUTION: UNITY AND DIVERSITY
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A rock column has 7 fossil layers, ordered oldest to youngest: Layer 1–Layer 7. Fossils found: Layer 1: crinoid. Layer 2: crinoid, fish bone. Layer 3: fish bone. Layer 4: fish bone. Layer 5: fish bone, turtle shell. Layer 6: turtle shell. Layer 7: turtle shell. Fossils provide evidence of extinction and appearance because they show when organisms are present or absent over time. Which prediction about fossil presence is most supported for a new layer (Layer 8) that formed after Layer 7 in the same location?
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