Answer:
Hybridisation The cross between two unidentical plants to give rise to a
new variety with desired trait is called hybridization.
Photoperiodism the effect of light
hours or daily duration of light exposure on the flowering of plant is called
photoperiodism. On the basis of light duration or dark exposure, plants one classified
as short day plant (requires short photoperiods) or long day plants (requires
long exposure of light).
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