In 2004,Jun-Yuan Chen and David Bottjer found a fossil approximately 580-600 million years old.Why was this particular fossil significant?
A)It was one of the earliest fossils of a single-celled organism.
B)It helped provide a date for the emergence of vertebrates.
C)It provided evidence that the earliest life forms were autotrophiC.
D)It provided evidence that the earliest life forms were heterotrophic.
E)It helped provide a date for the emergence of bilateral symmetry in animals.

Question

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The fossil found by Jun-Yuan Chen and David Bottjer was significant because it helped provide a date for the emergence of bilateral symmetry in animals, which is a key development in the evolution of complex life forms.

In 2004,Jun-Yuan Chen and David Bottjer Found a Fossil Approximately