The phylogeny of tetrapods and reveals that
A) wrist bones emerged after the tetrapod lineage appeared in the fossil record.
B) the common ancestor of tetrapods and lobe-finned fish had stout, paddle-shaped fins.
C) when digits first emerged, every species had five or less.
D) none of the above

Question

Quizplus · Accepted Answer

The common ancestor of tetrapods and lobe-finned fish indeed had stout, paddle-shaped fins, which is a key feature in the evolutionary transition from aquatic to terrestrial life. This characteristic is supported by fossil evidence and is a significant aspect of the phylogenetic relationship between these groups.

The Phylogeny of Tetrapods and Reveals That