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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.
Define Contractile Protein - biological functions of protein? These proteins take part in contractile processes like muscle proteins also those found in other cells and tissues
Q. What are the factors which influence the spoilage of meat? Can you list a few? Ans. Sure enough, you should be able to enumerate these having learnt about them earlier
Q. Economic aspect of biodiversity? Biodiversity serves as an income generating activity for countries around the world. Many people visit forests, beaches, mountains, grasslan
Is it possible to perform investigation of natural paternity, maternity or brotherhood and sisterhood using the ABO blood typing? By using an ABO blood typing it is possible on
What is biotechnology? Biotechnology is the application of biological knowledge to get new techniques, materials and compounds of pharmaceutical, medical, agrarian, industrial
ARM BONES - Each arm contain 30 bones as : humerus in upper arm, radius ulna in forearm, 8 carples in wrist, 5 metacorples in plam, 14 phalnges in fingers. HUMERU
Define the Concept of Nutrition? Nutrition may be defined as the science of food and its relationship to health. It is concerned primarily with the past played by nutrients in
Gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist. They may act by binding either to control parts within the promoter region nea
Q. Cardiac Catheterization of mitral stenosis? Cardiac catheterization is rarely needed to diagnose mitral stenosis. An end diastolic gradient more than 5 mm Hg. across mitral
what is ascus ?
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