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Two important human fossils that throw much light on the human ancestory were discovered in .Olduvai beds in Africa and in central Java respectively. Although the development of bipedalism and the resultant fieeing of hands are being regarded as the first happening towards the evolution of the genus Homo, subsequent human evolution essentially depended on the dramatic expansion in the brain size. This development in brain size began about 2 million years ago. Fossils discovered in Kenya and Tanzania suggested that individuals had cranial capacities more than 650 C.C. and close to 800 C.C. The fossils represented the first appearance of the human kind and termed Homo habilis which meant 'handy man' a term coined by Louis Leakey and his colleagues in 1964. Homo habilis had several features common to A. africanus such as similar height and weight and bipedal walking. But a closer scrutiny showed distinct differences in having a larger head (Fig. 14.8) and shorter rounder neck, relatively flat and less protruding face. Further, this Homo genus showed teeth Iess massive than southern apes. The name handy man suggests that he is a maker of tools. New discoveries from 1972 by Richard Leakey 'at Koobi fora in Kenya showed fossiI hominid skulls with cranial capacities of 800 C.C. More importantly along with the skulls, tools were also found there which justified the specific name habilis for the species and the inclusion of species under Homo.
Q. What do you mean by Myocarditis? Myocarditis is defined as inflammation of the myocardium. The most common cause is Coxsackie B virus infection. But it can also be due to
when microbial culture must be harvested after giving osmotic stress to analyze osmotolerant genes?
Q. What is embryonic sac? Which are the cells that form the embryonic sac? What are their ploidies? The embryonic sac is female gametophyte of angiosperms. The embryonic sac
Need an essay for my biology class. Need to know if you can do it. Thank you Instructions. Essay Assignment: Experimental Design Now that you have completed several hands-on la
The branches of the left coronary artery are anterio interventricular artery (AIV artery) and circumflex artery which is considered to be the continuation of the left coronary art
There is no store for nitrogen-having compounds as there is for carbohydrate (glycogen) or lipids (triacylglycerol). Thus nitrogen ingested in excess of what is required through
Q. What are the main biological functions of water? Ans. Water is the basic solvent for chemical reactions of living beings; it is the main means of substance transportati
WHY NETWORKING IN HOSPITALS Sharing of data is essential, especially in any kind of hospital setting. For staff and doctors of a hospital, if they have details of patients rea
Nitrification - Nutrient Cycles Ammonia or ammonium salts, are converted into nitrate in a process termed nitrification to be useful to most autotrophic and heterotrophic orga
What factors lead to spoilage of fish flesh? A difference in the composition of tissues among different species, climate, procurement and holding practices are amongst few of
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