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Homo Habilis-The First Tool Makers:
One of the most important developments in human evolution was the dramatic expansion in brain size which, according to the fossil data available so far, began atwo million years ago. Certain specimens recovered from deposits in East Africa apparently have brain capacities in excess of 650 cm3 and close to 800 cm3. Thesespecimens were taken to represent the first appearance of our om kind and weretermed Homo habilis. The species name Homo habilis, means, literally, handy mHomo habilis walked upright.
The bones of the hand, while displaying many characteristics of modern humans, are somewhat curved in places and more robusthan in modern man, i.e. Homo sapiens. The leg and foot bones have characteristthat are both ape-like and human-like, but overall, they are much closer to those o,nodern humans than to apes. The leg and foot were those of a habitual two-footedanimal. The simultaneous occurrence of Homo habilis fossils and crude flakes anstone tools indicate that they used tools. There is no evidence that this early form, homonids ate meat.
Explain the Mechanism of Phagocytosis In phagocytosis, the organism is entrapped into vacuoles known as "Phagosome". The cytoplasmic granules, organelles or lysosomes fuse with
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Wave and tidal energy: Waves and tides are another source of energy which is perpetual and can be converted into electric energy, particularly where sea water can move into a n
The Expanding Universe: Hubble's observations had proved the existence of galaxies. After mapping as many galaxies as could be seen by the telescopes then'available, he tu
types of neuron according to function
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Determine about the Bicarbonates Bicarbonates are highly soluble, Ca(HCO3)2 goes into solution. Further, stronger acids, like nitric a nd sulphuric acid present in soils thro
Decline of european science: By the middle of the second century B.C., the Greek empires were collapsing in anarchy andunder the weight of the more vigorous power of Rome. I
Nutrient groups and their functions: We should know that our body is made up of different chemical substances which are related to the food we take. Scientists have determine
REGULATIONS CONCERNING SAFETY AND HEALTH OF WORKERS IN INDUSTRIAL LABORATORIES The workers in industry engaged in using or producing chemicals, coal, high temperature, intense
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