Question

Wegener was intrigued when the same Mesosaurus fossils, an ancient freshwater reptile, showed up on different continents.

What hypothesis did he propose to explain this?


The fossils were moved by humans.


The fossils must be of different species.


The continents were at one time joined together.


The Mesosaurus swam between the two continents.

Answer 1

Since neither reptile could have swum great distances across salt water he inferred that they once lived on a single landmass that has since split apart.