Biologists estimate that there are tens of millions of species on Earth.How many have been described?
A) 18,000
B) 90,000
C) 180,000
D) 1.8 million
E) 9 million

Name: Biologists estimate that there are tens of millions of species on Earth.How many have been described? A) 18,000 B) 90,000 C) 180,000 D) 1.8 million E) 9 million
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As of 2021, it is estimated that around 1.8 million species have been described by biologists, leaving the vast majority of species on Earth undiscovered and unnamed.

Biologists Estimate That There Are Tens of Millions of Species