AIIMS2008Botany-Plant Reproduction
AIIMS 2008 Botany Species Concept MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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?
A
they cannot interbreed in nature
B
they are reproductively distinct
C
they are physiologically distinct
D
they are morphologically distinct
Correct Answer
Option A
Detailed Explanation
The process by which N2 is reduced to NH4+ is called nitrogen fixation.
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