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Nicotiana sylvestris flowers only during...

Nicotiana sylvestris flowers only during long days and N.tobacum flower 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 . tobacum to be separate species?

A

They cannot interbreed in nature

B

They are reproductively distinct

C

They are physiologically distinct

D

They are morphologically distinct

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The correct Answer is:
A
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Nicotiana sylvestris flowers only during long days and N.tobacum flower only during long days in the labortory undre different photoperiods , they can be induced to flower at the same time and can be cross fertized to flower aat the and can be corss fertillzed to produce self - fertile offsping .What is the best reason for considering N. syvestris and N . tobacum to be separate species

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