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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.
Scientific Chemistry: The Arab doctors, perfumers and metallurgists made their greatest contribution in chemistry. This was mainly due to the fact that Arab scholars, unlike
what is force
Define Antidiuretic Hormone - Posterior Pituitary Antidiuretic hormone or ADH, also known as vasopressin, is another polypeptide containing 9 amino acids. As the name of the ho
What common type of paper having substantial amounts of corundum and magnetite? Sand Paper
Define the Counter transport - Secondary Active Transport If the two substances which transport is coupled, move in opposite directions, the phenomenon is known as counter tran
Explain the Cleansing - Functions of Saliva Saliva is necessary to keep the mouth clean and to keep the structures within the mouth soft and pliable. In fever, when the salivar
Explain Control of Our Heart through Nerves When we exercise in the mornings, the heart beats faster and when we sleep at night, it slows down. Have you ever wondered how does
Ligases (synthetases) These enzymes (code EC 6) catalyze the linkage of two molecules coupled with the hydrolytic breakdown of a pyrophosphate bond in ATP or an analogous co
Properties of a Beating Heart Heart Let us study a few interesting properties of a beating heart which make it such a unique organ. 1. Automaticity 2. Rhythmicity 3. L
#2 DESCRIBE THE APPEARANCE OF THE STOMATE AND THE GUARD CELLS.
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