LIFE SCIENCE

Detailed explanation-1: -Repeated branching events, in which new species split off from a common ancestor, produce a multi-level “tree” that links all living organisms. Darwin referred to this process, in which groups of organisms change in their heritable traits over generations, as “descent with modification.” Today, we call it evolution.

Detailed explanation-2: -The theory of evolution is a shortened form of the term “theory of evolution by natural selection, ‘’ which was proposed by Charles Darwin and Alfred Russel Wallace in the nineteenth century.

Detailed explanation-3: -All living organisms are descended from common ancestors. They are modified descendants of creatures who lived in the distant past. This generalization is called evolution.

Detailed explanation-4: -Overwhelming evidence shows us that all species are related–that is, that they are all descended from a common ancestor. More than 150 years ago, Darwin saw evidence of these relationships in striking anatomical similarities between diverse species, both living and extinct.

Detailed explanation-5: -The theory of common descent states that all living organisms are descendants of a single ancestor.