write evolutionary history of modern man
Answers
Human 'gene' is similar to all genetic changes which affected our previous persons.
Exact origin of modern humans has been topic of debate.
Modern humans (Homo sapiens) species that means ‘wise man’ in Latin.
Our species is only surviving species of genus Homo but where we came from is a chapter of huge debate.
Modern humans initiated in Africa within past 2,00,000 years and evolved from most likely recent ancestor, Homo erectus which means ‘upright man’.
Homo erectus is an extinct species of human lived between 1.9 million and 1,35,000 years ago.
Two key models was brought forward to explain evolution of "Homo sapiens." These are ‘out of Africa’ model and ‘multi-regional’ model.
Another way ‘multi-regional’ model proposes that evolution of Homo sapiens occurred in number of places over long period of time and mixing of different populations ultimately led to single Homo sapiens species nowadays.
Explanation:
The evolutionary history of modern man:
•Approximately 7 crore years ago, the dinosaurs disappeared completely.
•At that time, monkey-like animals appeared from more or less similar to the modern lemurs.
•Tail of these monkey-like animals disappeared about 4 crore years ago. Due to enlargement of brain and improvement in their hands, ape-like animals were evolved and then later they evolved into gibbon and orangutan.
•From gibbon and orangutan, gorilla and chimpanzee evolved about 2.5 crore years ago.
•About 2 crore years ago first human-like animals evolved who had erect posture and able to use their hands.
•Ramapithecus ape recorded as first human-like animal. Afterwards, this ape grown up in size and became more intelligent.
•About 20 lakh years ago skilled human developed and about 15 lakh years ago evolved human with erect posture and walking.
•Neanderthal man was considered as the first wise-man.
•About 50 thousand years ago the Cro-Magnon man evolved and afterwards, this evolution had been faster than the earlier.
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