Biological or Organic Evolution: Organic evolution is the development of newer types of organisms from the pre-existing ones through gradual or abrupt changes in their components. When not specified, evolution means organic evolution. The term was coined by Spencer. Darwin has termed evolution to be “descent with modifications”. Weinberg depicts it as “changes in the gene pools of populations”. Buettner-Janusch defines it as “changes in gene frequencies between ancestral and descendant populations” or “changes in the morphology of organisms through time” or “changes in numbers and kinds of animals with major lineages”. In other words, evolution may be viewed as … Continue reading What is Organic Evolution? Give evidences for Human Evolution