Shoot Growth and Development :
Shoot Growth and Development
Flowering Plants :
Flowering Plants Photoperiodism: biological response to changing day lengths
Short day plant: plants that flower when dark period is more than a critical length. Flower in spring and autumn.
Long day plants: plants that flower when dark period is less than a critical length. Flower in summer.
Day neutral Plants: unaffected by photoperiod.
Breeding in animals :
Breeding in animals DAYLENGTH controls the timing of breeding cycles in birds and mammals. INCREASING day length: Sexual activity increases, so young are born when there is an adequate food (spring). DECREASING day length: sexual activity increases, so young are born in spring when there is an adequate food supply (spring) The day length required depends on the gestation period