Evolution is the gradual change of race due to variation is course of time. It is the history and development of race along with variations. Evolution is a continuous process and takes millions of years to evolve a new species.

Origin of universe is explained by big bang theory. According to this theory, whole universe was concentrated into single sphere. Due to same unknown region, there was explosion in it that forms different galaxies still moving away from each other.

According to abiogenesis theory of origin of life, life originated from non-living matter like gases, inorganic substance and water at particular temperature and pressure.

Fossils are dead remains of plants and animals buried inside the earth crust millions of year ago. Fossils are commonly preserved in sedimentary rock as this kinds of rocks are formed layer by layer in course of time.

• Chimpanzee is closely related to man. DNA content and DNA matching are the same in both.
• This similarity is more than 99% with chimpanzee whereas 94% with a gibbon.

Fossils are generally found in sedimentary rocks.

Darwin judged the fitness of an individual by number of offspring the individual produce in particular niche. More the viable offspring formed the more fit the organism in that surrounding.

Lamarck theory of organic evolution is also known as inheritance of acquired traits. He believed that the character an individual gain in his life time is also passed to next generation.

Process of evolution of different species in a given area starting from a point and radiating to another area of geography (habitats) is called adaptive radiation.  Example : Darwinian finches and Australian marsupials.

Adaptive radiation is the process of evolution in which different species in a given geographical area starting from a point and radiating to other geographical area.