Solutions of Evolution from BIOLOGY TEXTBOOK FOR CLASS 12 - hr

This topic highlights the theories and experiments related to the origin of life. The origin of life is considered a unique event in the history of the universe.

This topic briefs the three connotations of the theory of evolution of life forms. According to Charles Darwin, the present living form shares similarities with the life forms that existed millions of years ago.

This topic discusses the various evidence of evolution in detail. Here, it presents the embryological support for evolution. Further, it explains homologous and analogous evolution.

This topic briefs on adaptive radiation which is the process of evolution of different species in a given geographical area starting from a point and literally radiating other habitats. This concept is well explained with the aid of examples.

This topic briefs the two key concepts of Darwinian theory. Evolution by natural selection would have started when cellular forms of life with differences in metabolic capability originated on the earth.

In this topic, we shall understand Hugo De Vries’ idea of mutation, which states that mutations are random and directionless and causes evolution and speciation.

This topic defines the Hardy-Weinberg principle and the factors that affect the genetic equilibrium. It says that a population’s allele frequencies are stable and remain constant from generation to generation.

This topic discusses the evolution of life forms in brief. Here, it includes the schematic representations of the evolution of plant forms and vertebrates through geological periods.

This topic discusses the origin and evolution of humans. It says that homo sapiens arose from East Africa and moved across continents and developed into distinct races.