Paleontologists examine fossils embedded in sedimentary rock to help trace the history of animals that exist today and animals t hat have become extinct. What can the fossil record tell us about animals?
1 answer:
Answer:
B . Ex: A ancestor of megalodon shark was discoverd
and was compared with the meg , there were some resebelance
Explanation: Fossils can tell how animals evolved over time , and much more
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You need to read the introduction like this
<span>C) sex cells with half the original chromosome number.
Answer:
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Explanation:
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A
Activation energy is required to start a chemical reaction. Activation energy is the energy needed to allow the reactant to react. Activation energy is measured in Joules (J).
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