Answer the questions using the accompanying figure depicting the history of vascular plant diversity. Match each color and corresponding letter in the key to the group of vascular plants it represents.
Figure 23.15
Correct Answer:
Q56: Alan Cheetham observed a punctuated pattern of
Q57: Peter Sheldon found that the number of
Q58: What percentage of the species that have
Q59: When scientists examined fossils of Ordovician trilobites,
Q60: Fossil evidence from five continents exists for
Q62: Match each of the following events with
Q63: The punctuated equilibrium hypothesis suggests that speciation
Q64: Most fossils form in sedimentary rocks.
Q65: Scientists hypothesize that the massive Permian extinction
Q66: A trait that is adaptive in one
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