Improvement in Food Resources — Science STD 9 — Question

Hybridisation The cross between two unidentical plant to give rise to a new variety with desired trait is called hybridisation.
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).