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Evolution

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors? 

  • shortening of jaws

  • Binocular vision

  • Increasing brain capacity 

  • Upright posture


C.

Increasing brain capacity 

The first human- like being was the hominid, called Homo habilis. The brain capacities were between 650 - 800 cc. They probably did not eat meat. Fossils discovered in Java in 1891 revealed the next stage, i.e, Homo erectus. Homo erectus had a large brain and probably ate meat. The Neanderthal man with a brain size of 1400 cc lived in near east and central Asia between 1,00,000-40,000 year back. They used hides to protect their body and buried their dead. Homo sapiens arose in Africa and moved across continents and developed into distinct races. During ice age between 75,000 - 10,000 years back modern HOmo sapiens arose

The first human- like being was the hominid, called Homo habilis. The brain capacities were between 650 - 800 cc. They probably did not eat meat. Fossils discovered in Java in 1891 revealed the next stage, i.e, Homo erectus. Homo erectus had a large brain and probably ate meat. The Neanderthal man with a brain size of 1400 cc lived in near east and central Asia between 1,00,000-40,000 year back. They used hides to protect their body and buried their dead. Homo sapiens arose in Africa and moved across continents and developed into distinct races. During ice age between 75,000 - 10,000 years back modern HOmo sapiens arose

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What conditions were created by Miller in his experiment?

Miller  created electric discharge in a closed flask that contained CH4, NH3, H2 and water vapour at high temperature like 800°C
708 Views

Give another name for origin of life from non living matter.

Abiogenesis
771 Views

Arrange the following substances in a proper sequence with regard to the formation of chemical constituents at the time of origin of life :

Sugar, methane, nucleic acid and amino acid.


Methane—sugar—amino acid—nucleic acid.
752 Views

When did life appear on earth ?

 500 million years ago.
996 Views

What is the phenomenon called when the original drifted population becomes founders?

Founder Effect.
733 Views