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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.
Chemical Reactions of Amino Acids The chemical reactions of amino acids can be divided into three classes: i) Reactions of carboxylic group ii) Reactions of amino group
Define Procedure for Estimation of Iron in the Solution? Carry out the experiment following the steps enumerated herewith: 1. Weigh 702 mg of reagent grade ferrous ammonium
Important physico-chemical properties of pantothenic acid are as follows: a) Pantothenic acid is a pale yellow oily liquid that can only be crystallized as its sodium, potassi
Riboflavin (vitamin B2) Riboflavin was isolated in a crystalline form from milk by Kuhn and co-workers in 1933. Because of this, the early name of the vitamin was la
how has Modern sequencing helped in our understanding of the human genome?
Shut -down Sequences : In some respects, the time when the lab is being shut down is potentially one of the most dangerous periods of the day. For example, at the end of a day's w
Evaporation Highly volatile liquid wastes could be disposed of by effective ventilation. Example : Diethyl et-her. Moderately volatile liquid wastes can be absorbed on
what is the unit that heat is measured in
Can a radioactive element completely decay so that it is all stable matter?
lable the direction of increasing frequency and the direction of increasing wavelength on the em.
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