Hugo de Vries formulated the “Mutation Theory'' based on the experiments he conducted on

Study of improvement of human race by providing ideal nature is

Jumping genes in maize were discovered by

Nicotiana sylvestris flowers only during long days and $N$.tabacum flowers only during short days, if raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be cross fertilized to produce self-fertile offspring. What is the best reason for considering $N .$ sylvestris and $N$. tobaccum to be separate species?

Barr bodies are

Who was the scientist to introduce $ABO$ blood groups