The theory of mutation 'Mutation theory' was propounded by a Dutch Scientist; De-Vries in 1901. He had observed an unusual occurrence in a plant called evening primrose.

Correct Option: A

The theory of mutation 'Mutation theory' was propounded by a Dutch Scientist; De-Vries in 1901. He had observed an unusual occurrence in a plant called evening primrose.

Wilhelm Johannsen was a Danish botanist, plant physiologist, and geneticist. In his book Elemente der exkten rblichkeitslehre he introduced the term gene. The term was coined in opposition to the then common pangene that stemmed from Darwin's theory of pangenesis. This book had become one of the founding texts of genetics.

Correct Option: D

Wilhelm Johannsen was a Danish botanist, plant physiologist, and geneticist. In his book Elemente der exkten rblichkeitslehre he introduced the term gene. The term was coined in opposition to the then common pangene that stemmed from Darwin's theory of pangenesis. This book had become one of the founding texts of genetics.

Johannes Friedrich Miescher, a Swiss physician and biologist was the first researcher to isolate and identify nucleic acid. He isolated various phosphate-rich chemicals, which he called nuclein then, from the nuclei of white blood cells in 1869. It is the first report of the discovery and isolation of the genetic material.

Correct Option: C

Johannes Friedrich Miescher, a Swiss physician and biologist was the first researcher to isolate and identify nucleic acid. He isolated various phosphate-rich chemicals, which he called nuclein then, from the nuclei of white blood cells in 1869. It is the first report of the discovery and isolation of the genetic material.