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Questions and Answers
What is the approximate duration of the Paleozoic Era in million years?
What is the approximate duration of the Paleozoic Era in million years?
Which period is characterized by the sudden diversification of metazoan?
Which period is characterized by the sudden diversification of metazoan?
What percentage of all marine species became extinct during the Permian Period?
What percentage of all marine species became extinct during the Permian Period?
What is the name of the first vertebrate to appear in the fossil record?
What is the name of the first vertebrate to appear in the fossil record?
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In which period did the first bird appear?
In which period did the first bird appear?
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What is the approximate duration of the Mesozoic Era in million years?
What is the approximate duration of the Mesozoic Era in million years?
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