Volpe's Understanding Evolution 7th Edition by Peter Rosenbaum

Exercise 14

The lobe-finned fish of the Devonian were capable of moving themselves from pool to pool during times of drought. Until recently, these fish, known as _________________, were thought to have been the direct ancestor of the amphibians.
A) Trilobites
B) Crossopterygians
C) Arthropods
D) Brachiopoda
E) Nautiloids