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In the above sections we discussed in detail the fossil record of primates in general and more particularly those of apes and the humans. Despite the fact that in recent years a number of hominid fossils have been discovered, the fossil history of humans is not complete and the evidence is only fragmentary. Therefore, it has become necessary that based on the available evidence we need to synthesise an acceptable path of human ancestory. The hominid family had its origin from the dryopithecine ancestors. The fossil record suggests that genus Proconsul and Ramapithecus could be the near point of the origin of the family Hominidae. There is a cbnsehsus among the paleontologists and anthropologists at one time that Ramapithecus was the earliest recognisable horninid. But now evidence is available that Ramapithecus was more close to orangutans than to hominids. Late miocene and early plioene period were short of primate fossils. It is only during the late pliocene period the first
remarkable hominid Australopithecus afarensis (Lucy) appeared. The australopithecines were a separate side branch of the hominid evolution and have no survivors in the modern world. This means the genus Homo derives its ancestory from an australopithecine species whose fossils could not be found. This species probably gave rise to Homo habilis, and subsequently through Homo erectus to Homo sapiens.
There is also another viewpoint. The A. afarensis led to A. africanus which divided into two lineages: 1) to Australopithecus robustus and A. boisei which represented the termination of the australopithecine lineage. 2) the more progressive branch gave rise to Homo habilis to H. erectus and finally $0 H. sapiens.
C o l l i ba c i ll o si s It is commonly seen in newly born farm animals and occurs in septicaemic and enteric collibacillosis forms. E tiology: The disea
How are ecological interactions classified? Ecological interactions are divided as intraspecific or interspecific interactions and as harmonious or inharmonious interactions.
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Properties of Phytochrome Phytochrome is a chromoprotein: this means it is composed of a protein and a chromophore. The chromophore is actually attached to the protein and is
Q. How can the features of the arthropod exoskeleton describe the terrestrial adaptation of some species of the phylum? In the arthropod exoskeleton there is a layer of wax whi
Question Write a short note on the following: 1 Dihybrid cross 2 Supplementary interaction 3 Maternal effect 4 Hardy Weinberg Equilibrium 5 What is Linkage? Ex
What is Subphylum Crustacea and Subphylum Uniramia? The Arthropoda are usually grouped into four subgroupings called subphyla (singular-subphylum). One of these four subphyla -
Explain Absorption and Metabolism of Minerals? All minerals in the diet are not equally absorbed. Also different compounds and complexes of same mineral are absorbed with diffe
What is plaque? Plaque is a film over the teeth and having of saliva, mucus, bacteria and the substances they produce. It may also have mineral salts of calcium and magnesium.
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