When a neuron carries the electrical potential of -70 millivolts, it is in the state called RESTING POTENTIAL. At the resting stage of the neuron, the inside of the neuron is 70 millivolts less than the outside. At this stage, there are more sodium ions outside the neuron and more potassium ions inside the neuron.
We examined the biogeographic patterns implied by early hominid phylogenies and compared them to the known dispersal patterns of Plio-Pleistocene African mammals. All recent published phylogenies require between four and seven hominid dispersal events between southern Africa, eastern Africa, and the Malawi Rift, a greater number of dispersals than has previously been supposed. Most hominid species dispersed at the same time and in the same direction as other African mammals. However, depending on the ages of critical hominid specimens, many phylogenies identify at least one hominid species that dispersed in the direction opposite that of contemporaneous mammals. This suggests that those hominids may have possessed adaptations that allowed them to depart from continental patterns of mammalian dispersal.
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The forester made an observation that the forest had mostly mature hemlock and very few young hemlock. This is common for outdoors scientists to make observations on the part of the natural world that is their field of study, and then draw conclusions from these observations. For example, the observation that the western edge of North and South America has a string of volcanoes or the ring of fire, plus the concordance between the east coast of South America and the western coast of Africa let first to the theory of continental drift and finally to plate tectonics. Similarly, the paucity of young hemlock and the existence of mature hemlock could also spark a conclusion, such as maybe the mature hemlock were diseased so couldn't create new offspring or perhaps a fire had wiped out the young ones, as two possible explanations which would depend on the actual circumstances observed by the forester.
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As farming became more productive, more people were able to : Engage in manufacturing. Rather then rely on manual labor, machine-based labor will reduce overall cost and will lead to big increase in profit
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