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Author Question: What is the estimated number of extant species on Earth? A) 1,000 to 50,000 B) 5 (Read 876 times)

penza

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on: Nov 3, 2013
What is the estimated number of extant species on Earth?
A) 1,000 to 50,000
B) 50,000 to 150,000
C) 500,000 to 1,000,000
D) 10,000,000 to 100,000,000
E) 5 billion to 10 billion


plus1

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Reply #1 on: Nov 3, 2013
I recall doing this last year, it's D, bye bye!


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penza

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Reply #2 on: Sep 16, 2014
Thanks so much!


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