Sexual Reproduction in Flowering PlantsEasy
Question
The critical photoperiod for 4 plants is given below :
plant ′A′ = 12 hrs. Plant ′B′ = 15.5 Hrs
Plant ′C′ = 11 hrs Plant ′D′ = 13 hrs
(i) Plant ′C′ flowers when it receives more than 11 hrs. of light
(ii) Plant ′A′ flowers when it receives a minimum of 12 hrs. of light
(iii) Plant ′B′ flowers when it receives about 10- 12 hrs. of light
(iv) Plant ′D′ flowers when it receives maximum of 13 hrs. of light
Which of the above plants is/are not the long day plant(s) ?
plant ′A′ = 12 hrs. Plant ′B′ = 15.5 Hrs
Plant ′C′ = 11 hrs Plant ′D′ = 13 hrs
(i) Plant ′C′ flowers when it receives more than 11 hrs. of light
(ii) Plant ′A′ flowers when it receives a minimum of 12 hrs. of light
(iii) Plant ′B′ flowers when it receives about 10- 12 hrs. of light
(iv) Plant ′D′ flowers when it receives maximum of 13 hrs. of light
Which of the above plants is/are not the long day plant(s) ?
Options
A.only plant A
B.plant A and C
C.only plant D
D.plant B and D
Solution
For flowering long day plants require duration of light more than their critical photoperiod.
[NCERT page-251 last paragraph]
[NCERT page-251 last paragraph]
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