Based on the passage, which of the following statements best describes how the Burgess Shale
fossils have influenced scientific theories about
evolution?
A. They have encouraged scientists to postulate a greater
role for random chance in evolution.
The strange groups of animals represented there have
changed our modern system of classification and thus
our understanding of life in general.
C. They have expanded scientific understanding of the
specific causes that drove some animal groups to
extinction.
B.
D.
Scientists have been able to identify in the fossils a
previously unprecedented variety in anatomical design,