Question No:1
Ethephon accelerates abscission in flowers and fruits like
[A] Cherry
[B] Walnut
[C] Cotton
[D] All
Question No:2
How does ethephon increase the yield of cucumber?
[A] promote senescence
[B] promotes female flowers
[C] promotes male flowers
[D] both (a) and (b)
Question No:3
For which role ABA was discovered?
[A] Abscission
[B] Dormancy
[C] Both (a) and (b)
[D] Ripening fruits
Question No:4
What are the actions of ABA?
[A] General plant growth inhibitor
[B] Inhibitor of plant metabolism
[C] Stimulates closure of stomata in epidermis
[D] All
Question No:5
Why is ABA called stress hormone
[A] Removes various stresses from plant
[B] Increase tolerance of plant to various kind of stresses
[C] Both (a) and (b)
[D] None
Question No:6
ABA plays an important role in all except
[A] Seed development
[B] Maturation
[C] Dormancy
[D] Germination
Question No:7
What is/are the factors that are unfavorable growth of seeds?
[A] Desiccation
[B] Air
[C] Carbon dioxide
[D] All
Question No:8
ABA is antagonist to
[A] IBA
[B] IAA
[C] GA2
[D] All
Question No:9
All are types of roles played by PGR except
[A] Individualistic
[B] Synergistic
[C] Both (a) and (b)
[D] None
Question No:10
Which of the following events are controlled by extrinsic factors via PGR?
[A] Vernalisation
[B] Flowering
[C] Dormancy
[D] All
Question No:11
All are extrinsic factors for growth and development except
[A] Temperature
[B] Light
[C] Both (a) and (b)
[D] Nutrition
Question No:12
What kind of plants require the exposure to light for a period exceeding a well defined critical duration?
[A] Short day plants
[B] Day-neutral plants
[C] Long day plants
[D] None
Question No:13
What kind of plants require the exposure to light for a period less than critical duration?
[A] Short day plants
[B] Day-neutral plants
[C] Long day plants
[D] None
Question No:14
Plants with no such correlation between exposure to light duration and induction of flower response are called
[A] Long day plant
[B] Day-neutral plants
[C] Short day plant
[D] None
Question No:15
What is more important of these?
[A] Light period
[B] Dark period
[C] Both (a) and (b)
[D] None
Plant Growth and Development Mock Exam-12
CategoriesNEET Biology