evolution of man -mammals evolved from primitive
EVOLUTION OF MAN -
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difference between artificial selection and natural selection -snoartificial selectionnatural selection1it is an artificial processit is a natural
reproductive isolation -according to the biological species concept members of one species are reproductively isolated from members of all other
speciation -origin of new species an isolated population of a species independently develops different types of mutationsthe later accumulate in its
species concept -according to davis and heywood species define as assemblage of individuals with morphological features in common and separable from
evolution of man -mammals evolved from primitive reptiles therapsida in triassic period about 210 million years agomammals existed as inconspicuous
characteristics of man -humans posses erect posture and bipedal locomotionhumans possess large sized brainhumans are less dependent on smellhumans
evolutionary changes that occurred in humans are -development of prominent chin increase in cranial capacity reduction of brow-ridgesdevelopment of
similarities between apes and man -absence of tailbroadened chest due to flattening of sternumsmaller lumber region due to reduced number of lumbar
chromosomes and molecular homology -the dna content of diploid cells is similarhoyer et al in 1965 showed that dna of humans was 100 similar with
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