Question

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. tabacum to be separate species : -

Answer 1

Hey din I illahi was the combination of religion and politics

Answer 2

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.

The best reason for considering N. sylvestris and N. tabacum to be separate species is that those species cannot inbreed in nature.