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Type: Multiple-Choice
Category: Zoology
Level: Grade 11
Author: csjonline
Last Modified: 5 days ago

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Zoology Question

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Grade 11 Zoology

In contrary to our common knowledge, the research suggests that sharks are not "living fossils" because                                                                    .
  1. the fossil of their gill structure shows extensive change over time
  2. they are active only in a narrow range worldwide
  3. they grow tens of thousands of teeth over a lifetime
  4. the fossils of shark scales are from about 420 million years ago
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