Asked by crystal
In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?
Trilobites existed before jellyfish and ammonites.
Jellyfish existed before trilobites and ammonites.
Ammonites existed before trilobites and jellyfish.
Jellyfish, trilobites, and ammonites lived together.
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Jellyfish existed before trilobites and ammonites.
Explanation: By the law of superposition, lower (older) rock layers contain older fossils. Since jellyfish are below trilobites, and trilobites are below ammonites, the order from oldest to youngest is jellyfish → trilobites → ammonites.
Explanation: By the law of superposition, lower (older) rock layers contain older fossils. Since jellyfish are below trilobites, and trilobites are below ammonites, the order from oldest to youngest is jellyfish → trilobites → ammonites.
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