Sub-topic 1
2026 · National One-Eighth
Free
Plant hormones: auxin and phototropism
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Sub-topic 2
2021 · National Preliminary
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Riddle: photoperiodism
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Sub-topic 3
2014 · National Quarterfinal
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Gibberellins promoting stem elongation and breaking dormancy
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Sub-topic 4
2014 · National Quarterfinal
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Cytokinins stimulating cell division and retarding leaf senescence
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Sub-topic 5
2014 · National Quarterfinal
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Gibberellins promoting coleoptile and stem elongation
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Sub-topic 6
2017 · National Quarterfinal
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Applications of plant hormones in agriculture (auxins, cytokinins, gibberellins, ethylene, aba)
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Sub-topic 7
2020 · National One-Eighth
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Physiological processes in plants affected by light (photosynthesis, photoperiodism, phototropism)
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Sub-topic 8
2021 · National Preliminary
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Nastic movements are non-directional responses, unlike directional tropic movements
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Sub-topic 9
2022 · National One-Eighth
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True or false: shoots show positive gravitropism and roots negative gravitropism
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Sub-topic 10
2022 · National One-Eighth
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True or false: both shoots and roots show positive gravitropism
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Sub-topic 11
2022 · National One-Eighth
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True or false: both shoots and roots show negative gravitropism
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Sub-topic 12
2023 · National Preliminary
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True or false: stomata open via decreased solute concentration in guard cells
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Sub-topic 13
2023 · National Preliminary
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True or false: stomata open via weakening of guard cell walls, allowing them to stretch
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Sub-topic 14
2023 · National Preliminary
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True or false: stomata open via increasing the water potential in guard cells
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Sub-topic 15
2023 · National Preliminary
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True or false: gibberellins promote seed germination via increased cell division rate
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Sub-topic 16
2023 · National Preliminary
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True or false: gibberellins promote germination via letting water through the hard seed coat
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Sub-topic 17
2023 · National Preliminary
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True or false: gibberellins promote germination by stimulating abscisic acid synthesis
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Sub-topic 18
2023 · National One-Eighth
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Gibberellin increases sugarcane stem length
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