. Number of known and described species is
(a) 1.7-1.8 billion.
(b) 17- 18 million.
(c) 1.7-1.8 lacs.
(d) 1.7-1.8 million.
Best Answer
(d) 1.7-1.8 million.
Currently about 1.7 million species are known, but this is considered to be a serious underestimation of the total number of species.
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