Ichthyosaurs were aquatic dinosaurs. Fossils show us that they had dorsal fins and tails, as do fish, even though their closest relatives were terrestrial reptiles that had neither dorsal fins nor aquatic tails. The dorsal fins and tails of ichthyosaurs and fish are
A)homologous.
B)examples of convergent evolution.
C)adaptations to a common environment.
D)A and C only
E)B and C only

Question

Quizplus · Accepted Answer

The dorsal fins and tails of ichthyosaurs and fish are examples of convergent evolution, as they evolved independently in response to similar environmental pressures, making them adaptations to a common environment.

Ichthyosaurs Were Aquatic Dinosaurs