All crossopterygians went extinct at the end of the Cretaceous.
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Q5: The evolution of seeds allowed plants independence
Q6: The development of seeds allowed plants to
Q7: Gymnosperms represent the earliest flowering plants.
Q8: Fish are the earliest vertebrates.
Q9: Terrestrial vascular plants probably evolved from green
Q11: The Devonian period is also known as
Q12: Lobe-finned fish are important in the fossil
Q13: Plants became extinct at twice the rate
Q14: Part of the gill structure in jawless
Q15: The early fish were jawless and armored,
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