When Scientists Examined Fossils of Ordovician Trilobites, They Found That

Multiple Choice

When scientists examined fossils of Ordovician trilobites, they found that a sample from any given stratum was almost always intermediate in their morphology between samples from strata just above or below it, providing evidence of ____.

A) convergent evolution
B) rapid speciation
C) adaptive radiation
D) punctuated equilibrium
E) phyletic gradualism