Life Scientific research Essay

" Lab Assignment #2 (Horse Evolution)”

Through fossil data from Hyracotherium to Mesohippus to Merychippus to Pleshippus to the Equus, one can begin to see the development of teething, limbs and skull based on the environment that the horses tailored to over time. Environmental improvements from the Miocene pliocene, pleistocene to the Holocene brought about organic selection since the horses' initial attributes could not modify. In order to survive, horses developed traits just like stronger braches, tougher tooth and others that best fit and adapted to their surroundings. In this lab, all of us examined these five horse evolution fossils to understand the change in equine morphology pertaining to the an environment and the organic selection in the horse populace. Hyracotherium, one of many fossils discovered, has morphologic characteristics that suggest lifestyle in solid, closed canopy forests. The species' teeth characteristic, bunodont, is the of a browsers eating habit. In addition , the small skull, small rostrum and a shorter masseter suggests a diet of easily chewable and digestible soft food, like all types of berries and nut products, mainly present in forests. Likewise, their digitgrade limbs are most flexible to a habitat requiring more maneuverability than speed. In a thick cover forest, speed would be pointless as there is obstacles of trees, shrubs and moist grounds. Alternatively, maneuverability will be much more efficient in a forest where the area are bushes, shrubs and trees. This kind of limb likewise becomes very easily fatigued even though that is hazardous in an wide open grassland, this kind of quality is acceptable within a thick cover forest exactly where running is restricted to short periods of time.

Beginning in the Miocene, because the environment became more dry and much cooler, the increase in grasslands affected the morphology of horses teeth and jaw. Before the Miocene, horse populations confirmed signs of bunodont teeth that were meant for moving into forests or areas plentiful of gentle foods. Yet , the increase in grasslands evolved the...