Right Now the Background Extinction Rate Is About What It

question 9

Multiple Choice

Right now the background extinction rate is about what it normally has been historically through geologic time. True or False?

• A) True. It's quite constant over time.
• B) False. It's somewhat lower now than has been typical.
• C) Can't tell. We weren't around early on so we have no way of knowing.
• D) False. It's much higher now than has been typical.
• E) True. It looks like it, but we monitor species so much better now, we might just be seeing more species.

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