Question

Which of the following is an example of a reptile that returned to the water about 200 mya?

Options

• Ichthyosaurs

• Tyrannosaurus rex

• Birds

• Amphibians

Answer 1

About 200 mya, some reptiles returned to the water; Ichthyosaurs are often cited as examples. This represents a secondary adaptation to aquatic life, demonstrating the evolutionary flexibility of reptilian lineages during the Mesozoic era.