Question : Branching descent and natural selection are the two key concepts of Darwinian Theory of Evolution. Explain each concept with the help of a suitable example.

Question : Branching descent and natural selection are the two key con

1.	Question : Branching descent and natural selection are the two key concepts of Darwinian Theory of Evolution. Explain each concept with the help of a suitable example.
Answer» Solution :Branching descent: The process of evolution of different species in a GIVEN GEOGRAPHICAL area starting from a POINT and literally radiating to other areasof geography (habitats) is called adaptive radiation Example: The many varieties of Darwin's finches having different beaksevolved from the original seed EATING variety in the same island itsell Natural Selection. It is a process in which a heritable variation enablingbetter survival of an organism leads them to reproduce and leave a greater number of progeny Example: Excess use of herbicides and pesticides has resulted in the selection of resistant varieties, LIKE the evolution of DDT resistant mosquito.