Humans have identified ________ species; while the working estimate is ________ estimated species on Earth.
A) 1,750,000; 13,600,000
B) 950,000; 13,600,000
C) 270,000; 320,000
D) 950,000; 8,000,000
E) 1,750,000; 100,000,000

Question

Quizplus · Accepted Answer

The current number of identified species is around 1,750,000 according to the Catalogue of Life, while the estimated number of total species on Earth ranges from 8,700,000 to 100,000,000, with a working estimate of 13,600,000 by the Census of Marine Life. Choice A matches the identified and estimated numbers the most closely.

Humans Have Identified ________ Species; While the Working Estimate Is