Question

write short notes based upon the information known to you
Darwin's theory of natural selection ​

Answer 1

Answer:

*Darwin's Theory of Evolution by Natural Selection

*More individuals are produced each generation that can survive.

*Phenotypic variation exists among individuals and the variation is heritable.

*Those individuals with heritable traits better suited to the environment will survive.

*When reproductive isolation occurs new species will form.

These are the basic tenets of evolution by natural selection as defined by Darwin. The following is a quote from Darwin.

"Variation is a feature of natural populations and every population produces more progeny than its environment can manage. The consequences of this overproduction is that those individuals with the best genetic fitness for the environment will produce offspring that can more successfully compete in that environment. Thus the subsequent generation will have a higher representation of these offspring and the population will have evolved."

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.