Relative to the number of described species that are currently alive on Earth, there are about _______ as many described fossil species.As a result, scientists conclude that many species have evolved and gone extinct without being documented.

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There are about 1/6 as many described fossil species as there are described species currently alive. This discrepancy suggests that many species have evolved and gone extinct without being documented, highlighting the vast and largely unexplored history of life on Earth.

Relative to the Number of Described Species That Are Currently