At the present time
A) all living organisms have been discovered, named, and their relationships to other organisms described.
B) humans have just finished a complete count of the number of species on Earth.
C) the diversity of organisms on Earth is not completely known and estimates of the number of unknown species vary 10-fold.
D) there is no consensus regarding the appropriate classification strategy for the currently known organisms.

Question

Quizplus · Accepted Answer

Despite continuous efforts to discover and study the diversity of life on Earth, there is still a lot that remains unknown. Estimates suggest there could be anywhere from 5 to 50 million species yet to be discovered, leading to significant variations in estimates of the total number of species on Earth.

At the Present Time