Introduction to Pomology MCQs (Quiz 20) Posted on July 25, 2026Author agropublishers 0 1. Fruit thinning is usually performed to optimize the tree’s _________________ Water absorption Root respiration Seed dormancy Source–sink balance 2. The principal function of scaffold branches is to _______________ Conduct photosynthesis Absorb water Support the framework of the tree crown Produce bark 3. Post-bloom GA3 application in table grapes primarily acts by ___________________ Inhibiting gibberellin biosynthesis in the pedicel Accelerating anthocyanin synthesis in the berry skin Elongating the pedicel and rachis to reduce cluster compactness while enlarging berries Triggering abscission of immature florets 4. __________________ is the resumption of growth after dormancy Fruit set Bud break Vernalization Anthesis 5. _______________________________ is a direct consequence of having fewer sinks after thinning Reduced sugar production Increased transpiration Reduced leaf area Increased sugar availability per fruit 6. Potential disadvantage of somaclonal variation in commercial micropropagation includes ________________ Increased genetic uniformity Elimination of all epigenetic changes Loss of desirable clonal traits in some regenerants Complete sterility of all regenerated plants 7. The principal purpose of applying GA₃ after berry set in table grapes is to _________________________ Prevent fruit cracking Delay fruit ripening Induce flowering Increase berry size 8. Which orchard system depends most heavily on dwarfing rootstocks? Traditional orchards Rainfed orchards Alley cropping Ultra High-Density Planting 9. In modern orchards, the principal purpose of canopy management is to optimize _______________________________________________________ Light interception and photosynthetic efficiency Pollination Nitrogen fixation Root respiration 10. In table olives, plant growth regulator ______________ is typically applied to reduces flower and fruit set promote larger fruit size and reduce the need for manual thinning 2,4-D (2,4-dichlorophenoxyacetic acid) Gibberellic acid (GA3) Abscisic acid None of these Loading … Question 1 of 10
