NEET BIOLOGY

Detailed explanation-1: -Alfred Russel Wallace noted the similarities and differences between nearby species and those separated by natural boundaries in the Amazon and Indonesia. Independently they came to the same conclusion: over generations, natural selection of inherited traits could give rise to new species.

Detailed explanation-2: -Charles Darwin and Alfred Russel Wallace independently discovered the mechanism of natural selection for evolutionary change.

Detailed explanation-3: -Despite this setback, Wallace set off on another voyage in 1854 to Southeast Asia to collect more samples. By 1855, his observations led him to the conclusion that living things change over long periods of time-they evolve.

Detailed explanation-4: -To account for the phenomenon, Wallace proposed an imaginary line to divide the region into two parts. The animals found on each side of the line can be shown to have an evolutionary connection to either Asia (to the West of the Wallace line) or Australasia (to the East).

Detailed explanation-5: -While exploring the archipelago, Wallace refined his thoughts about evolution, and had his famous insight on natural selection. In 1858 he sent an article outlining his theory to Darwin; it was published, along with a description of Darwin’s theory, that same year.