The phytochrome pigment exists in…….. forms.
a) two
b) three
c) four
d) five
Explanation: 1. Pr (absorb redlight 660 nm) and Pfr (absorb red light (730nm)
Which of the following is/are the function/s of P fr phytochrome?
a) promotes flowering in long day plants
b) responsible for sed germination and development of anthocyanin
c) inhibits flowering in short day plants
d) all of these
Which of the following hormone initiates flower formation?
a) auxin
b) cytokinin
c) florigen
d) gibberellin
Florigen hormone is produced in………
a) flower
b) leaves
c) stem
d) buds
Size of the flower of chrysanthemum may be enlarged by removing……….
a) a few leaves
b) all leaves
c) all branches except one
d) all floral bud except one
The conversion of winter variety into the spring variety by low temperature treatment is called……
a) germination
b) aestivation
c) vernallization
d) photorespiration
Explanation: it is a Latin word means spring. This term was coined by Lysenko in 1928
