NEET BIOLOGY

Detailed explanation-1: -Darwin thought of evolution as “descent with modification, ” a process in which species change and give rise to new species over many generations. He proposed that the evolutionary history of life forms a branching tree with many levels, in which all species can be traced back to an ancient common ancestor.

Detailed explanation-2: -Darwin proposed that species can change over time, that new species come from pre-existing species, and that all species share a common ancestor. In this model, each species has its own unique set of heritable (genetic) differences from the common ancestor, which have accumulated gradually over very long time periods.

Detailed explanation-3: -What is natural selection? Charles Darwin’s theory of evolution states that evolution happens by natural selection. Individuals in a species show variation in physical characteristics. This variation is because of differences in their genes?.

Detailed explanation-4: -Conclusion. Evolution describes changes to the inherited traits of organisms across generations.

Detailed explanation-5: -Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime-such as greater development of an organ or a part through increased use-could be transmitted to their offspring.