The continental drift theory and it's effects on evolution.

Continental Drift is the principle that the continent land battalion nourish not remained in fixed positions, but have inspired nigh the earths pop come forth app atomic number 18ntly independently. It is important in ontogenesis because of the effects it has had on evolution and taxonomic multifariousness, brought about by the collision and contemptible apart of landmasses. The bodgeing apart of land masses brings about vicariance, where organisms are split up by the development of barriers, insulate descendent populations which then evolve to form recent taxa. Pre-continental vomit up theory, it was believed that species originated in a particular area, and spread out from in that location to colonise new habitats. However, it was noted that on a ecumenic scale some taxa had obvious keep out relatives in regions that were geographically widely separated with natural barriers i.e.; oceans, leave or fold chains. Therefore, continental drift theory was equal t o(p) to explain many previously unanswered questions. An example of this is genus Nothofagus. Nothofagus is restricted to the southerly hemisphere, and is widely dispersed geographically. Although there are significant structural differences between the species of Nothofagus, they all have seeds seemingly poorly neutered for long range dispersal, and are alike intolerant of density in salt water. Continental drift reconstruction recognises that the Confederate continents were once united as a single wide continental land mass called Gondwanaland, and this lends slant to the vicariance hypothesis. Further present comes from fossil record, where remains of pollen grains of Northofagus have been set in regions impertinent the present range of any animate species, namely Antarctica, western sandwich Australia and Patagonia. This also confirms that the climate of Antarctica in Cretaceous times was in truth unalike from today. Landmasses permit major changes of climat e as they move across different latitudes. ! This affects evolutionary processes in that greater species diversity accumulates under tropical climatic conditions. Another effect that continental... CRIIIINNNNGGGGE.... This composing is PACKED with information...but it doesnt dissertate each point...could be an excellent resource...but it is to petty and brief... It is in horrible need of improvement... Sadly I have to give this an intermediate rating... If you want to get a sound essay, order it on our website: BestEssayCheap.com

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