Question

Write short notes on Darwin’s theory of natural selection based upon the information known to you.

Answer 1

Dear Student,

◆ Darwin's theory of natural selection -

• Natural selection is the process by which organisms that are better suited to their environment are selected in evolution.
• Charles Darwin published theory of evolution in his book named 'Origin of Species'.
• He coined term survival of the fittest and natural selection in this context.
• Survival of the fittest means during evolution, only fittest will survive and weak will be perished.
• Darwin explained survival of the fittest but not arrival of the fittest.
• Mechanisms of natural selection are - overproduction, differential production, struggle for survival and genetic variation.
• For example, black moths which camouflage better with dark barks survive.

Thanks dear. Hope this helps you...

Answer 2

Answer:

• Darwin’s theory  of  natural selection  states  that  all  the  organisms have  great capacity  to  reproduce.  
• As a  result population  of  organisms  increases at  high  rate.  
• All  the organisms compete  with  each  other  for  food  and  space.  
• In  this competition,  only  those organisms survive  which  modified  according  to  the  environmental conditions.  
• The nature  selects  only  those  organisms which  are  fit to  live  and  the  remaining  disappears.
• The  selected  organisms live  and  perform  reproduction.  
• They  give  rise  to  the  new species  with  their  own  specific characters.