About how many species are known and described so far?
A0.7 to 0.8 million
B170 to 180 million
C1.7 to 1.8 million
D17 to 18 million
Answer & Solution
Correct answer: C. 1.7 to 1.8 million
Known and described species number roughly 1.7 to 1.8 million, a figure that keeps rising as new organisms are found.
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