alleryHow many species are known and described, approximately?
A1.7 to 1.8 thousand
B1.7 to 1.8 hundred
C1.7 to 1.8 million
D1.7 to 1.8 billion
Answer & Solution
Correct answer: C. 1.7 to 1.8 million
1. The figure counts described species, not estimated ones.
2. It runs into millions rather than billions.
3. The number of species known and described ranges between 1.7 and 1.8 million.
4. So the answer is 1.7 to 1.8 million.
_Source: syllabus Biology, Ch 1 'The Living World'_
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