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Questions and Answers
What is the definition of biodiversity?
What is the definition of biodiversity?
- The total number of species on Earth
- The diversity within ecosystems
- The variety of life on Earth and its interdependence
- The variability among living organisms from all sources (correct)
How many species have scientists estimated to be on Earth?
How many species have scientists estimated to be on Earth?
- More than 2 million
- 5 billion
- 10-14 million (correct)
- Tens of millions
What percentage of species have become extinct since the beginning?
What percentage of species have become extinct since the beginning?
- 99.9% (correct)
- 50%
- 25%
- 10%
What did the 1992 Earth Summit in Rio de Janeiro define biodiversity as?
What did the 1992 Earth Summit in Rio de Janeiro define biodiversity as?
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Why is biodiversity important?
Why is biodiversity important?
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