Which of the following is/are the example/s of long day plants?
a) Hibisuc
b) beet and spinach
c) potato
d) all of these
Explanation: for long day plants the critical value is minimum for flowering
Which of the following plants produce flowers whenever they mature?
a) short day plants
b) long day plants
c) day neutral plants
d) all of these
Which of the following is/are the example/s of day neutral plants?
a) maize, tomato
b) sunflower
c) cucumber
d) all of these
The critical day length for short day plant is………
a) 15 and half hours
b) 11 and half hours
c) 17 hours
d) 9 and half hours
The critical day length for long day plant is………
a) 15 hours
b) 11 hours
c) 17 hours
d) 12 hours
Which of the following pigment commonly present in small amounts in the tissues of higher plants, is sensitive to the transition between light and darkness?
a) cytochrome
b) chlorophyll
c) phytochrome
d) xanthophyll
