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What percentage of all gymnosperm species currently face the threat of extinction?
What percentage of all gymnosperm species currently face the threat of extinction?
What is one key difference between the 'Sixth Extinction' and previous episodes of mass extinction?
What is one key difference between the 'Sixth Extinction' and previous episodes of mass extinction?
Which group of species is stated to be more vulnerable to extinction in the text?
Which group of species is stated to be more vulnerable to extinction in the text?
What does the text suggest regarding the history of species extinctions on Earth?
What does the text suggest regarding the history of species extinctions on Earth?
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How many episodes of mass extinction of species have occurred since the origin and diversification of life on Earth?
How many episodes of mass extinction of species have occurred since the origin and diversification of life on Earth?
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What is the estimated rate at which current species extinctions are occurring compared to pre-human times?
What is the estimated rate at which current species extinctions are occurring compared to pre-human times?
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What is the main cause of the increased rate of species extinctions in the 'Sixth Extinction'?
What is the main cause of the increased rate of species extinctions in the 'Sixth Extinction'?
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