Final answer:
The findings of fossils like Glossopteris and Mesosaurus on different continents support the theory of plate tectonics.
Step-by-step explanation:
Alfred Wegner's findings of fossil evidence such as the Glossopteris and the Mesosaurus on the continents of Africa and South America have been used to support the theory of plate tectonics.
This is because the presence of these fossils on both continents suggests that they were once connected, as the organisms would not have been able to cross large bodies of water.
This finding provides evidence for continental drift and the movement of the Earth's tectonic plates over time.
Learn more about Plate tectonics