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Questions and Answers
What percentage of Earth's current species have been documented?
What percentage of Earth's current species have been documented?
- 13.6% (correct)
- 50%
- 99%
- 86.4%
How are individuals of the piping plover counted?
How are individuals of the piping plover counted?
- By transect method
- By satellite
- By census (correct)
- By estimation
How many species are estimated to have ever lived on Earth?
How many species are estimated to have ever lived on Earth?
- 10 million
- 1 million
- 100 million
- 5 billion (correct)
How many species have been described according to one study?
How many species have been described according to one study?
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In what period did approximately 17,000 species get described per year?
In what period did approximately 17,000 species get described per year?
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