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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.
Blowing soap bubbles Soap films and bubbles serve very well for observations on surface tension. You can make a good soap bubble solution by placing three level tablespoonfuls o
Respiration: Food + oxygen -> carbon dioxide + water + energy Food is not only a source of energy, but also the nutrients used to build up the organisms' bodies. So we
Explain the Functions of Glucocorticoids Cortisol, cortisone and hydrocortisone are the names given to the glucocorticoids. What is their function in our body? They play a majo
Explain the Chemical Control of Respiration Let us now focus on the chemical control of respiration. But before that, let's get to know which chemicals are involved in this pro
Explain Protein Protein is derived from a Greek word "PROTOS" which means "Pre eminent", "jht or foremost" or primary matter. This name was suggested by Berzi
Water Pollution Pollution of fresh water is one of the most serious environmental problems of the world as a whole. In our country most of the rivers and lakes are polluted
classification of various qualitative & quantitative health management technologies
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working of calomel electrode
Requirements Cell holder - 1 Bulb holder - 1 Wire - 1 Bulb (2.0 V) - 1 Cells (1.5 V) - 2 Plug (6/ 16 A) - 1 Screw driver - 1 Crocodile clips - 4 pair
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