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Evolution

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Industrial melanism as observed in peppered moth proves that

  • The true black melanic forms arise by a recurring random mutation.

  • The melanic form of the moth has no selective advantage over lighter form in industrial area

  • The lighter-form moth has no selective advantage either in polluted industrial area or non-polluted area

  • Melanism is a pollution-generated feature


A.

The true black melanic forms arise by a recurring random mutation.

Industrial melanism is a term used to describe the evolutionary process in which darker individuals come to predominate over lighter individuals since the industrial revolution as a result of natural selection. In 1848 a black form of the moth was recorded in Manchester and by 1895,  98% of the peppered moth population in Manchester was black. This black "melanic" form arose by a recurring random mutation, but its phenotypic appearance had a strong selective advantage in industrial areas. 

Industrial melanism is a term used to describe the evolutionary process in which darker individuals come to predominate over lighter individuals since the industrial revolution as a result of natural selection. In 1848 a black form of the moth was recorded in Manchester and by 1895,  98% of the peppered moth population in Manchester was black. This black "melanic" form arose by a recurring random mutation, but its phenotypic appearance had a strong selective advantage in industrial areas. 


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

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

Founder Effect.

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.

When did life appear on earth ?

 500 million years ago.

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

Abiogenesis