Why were the fossil remains of mesosaurus important to alfred wegener?
they proved that earth is composed of several rocky tectonic plates.
they proved that mesosaurus is extinct.
they were the first fossils discovered in africa and south america.
they suggested that the two continents where they were found could have been joined.

Option (4)

Explanation:

The 'Mesosaurus' were the reptile-like organisms that existed during the early Permian age. The fossils of this organisms were collected from the southern continents such as South Africa and South America, where the two continents were separated due to the formation of the Atlantic ocean.

This fossils were observed by Alfred Wegener and suggested that this was one of the evidence of the continental drift theory, where he thought that these two continents were earlier attached together in its geological past. With the gradual increase in time, these two continents got separated.

Hence, the most appropriate answer is option (4).

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.