Evolution is the change in the inherited traits of a population of organisms through successive generations.
Evolution is the change in the inherited traits of a population of organisms through successive generations. After a population splits into smaller groups, these groups evolve independently and diversity into new species. A hierarchy of anatomical and genetic similarities, geographical distribution of similar species and the fossil record indicate that all organisms ate descended from a common ancestor. Laetoli is a site of Thnzania famous for its hominid (human and its fossil ancestors) footprints, preserved in volcanic ash.
(i) What is the main reason for evolution according to Darwin ?
(ii)'Both Human beings and chimpanzee have a common ancestor'. Justify the statement by giving reason behind the conclusion.
1 Answers
(i) Natural selection and generation of new species.
(ii) (a) Changes due to genetic drift and natural selection will result in the isolation of two subpopulation which becomes more and more different from each other.
(b) Characters of the fossils also stated the characteristics of ancestors.