Explanation:As to prove that the continents were formed before the mountains were formed can be explained by the formation of the rocks and the there properties associated with them. The mountains are thus formed by the dominance of the heavier and the lighter plates and thus that d to there formation on earth due to the deposition of the sediments in the sea and thus the properties of the rock are important for there existence.
A student wants to prove that amphibians appeared on earth before birds. The student should use the fossil findings as evidence to provide the most reliable information about the periods when amphibians and birds appeared on earth. Fossils would throw light on the internal body structures that bear the closest similarity to either the amphibians or the birds. The radiocarbon dating of the fossils will reveal its age. This can be used to figure out the time of divergence of the two types.
Fossils are formed when dead organisms, sink below the heap of sediments. The decomposers in the soil feed upon the soft body parts and hard remains are left. These hard remains includes wood, pollen, bones, shells and others. These remains gets preserved in the rocks as fossils.
Pelaeobotany is the branch of botany that deals with the recovery and identification of the plant remains. It is useful for the reconstruction of the geological past events. It also defines how new plant species evolved from the primitive plant species, on the basis of the structures and features observed in the excavated plant fossil evidences.
In the given situation, the pine trees are evident to produce needles and cones which both are non-decomposing evidences. The fossils of these evidences proves that gymnosperms where the primitive plants, from which angiosperms or flowering plants have evolved.
Therefore, plant fossils would provide the most reliable information about the periods when the two types of plants appeared on Earth.