Sub-topic 1
2025 · National One-Eighth
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Plant hormones (phytohormones) and their functions
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Sub-topic 2
2026 · National Preliminary
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Plant hormones (phytohormones) and their functions
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Sub-topic 3
2025 · National Preliminary
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Plant hormones (phytohormones) and their functions
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Sub-topic 4
2025 · National One-Eighth
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The histogen theory of the root apical meristem
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Sub-topic 5
2026 · National One-Eighth
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Tropisms
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Sub-topic 6
2025 · National One-Eighth
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Secondary growth in plants: lateral meristems
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Sub-topic 7
2025 · National One-Eighth
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Plant hormones (phytohormones) and their functions
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Sub-topic 8
2025 · National One-Eighth
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Insect life cycle and metamorphosis
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Sub-topic 9
2025 · National One-Eighth
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Insect life cycle and metamorphosis
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Sub-topic 10
2023 · National Preliminary
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Insect life cycle and metamorphosis
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Sub-topic 11
2025 · National One-Eighth
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Characteristics and control of growth in organisms
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Sub-topic 12
2025 · National One-Eighth
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Plant galls: abnormal tissue growths
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Sub-topic 13
2026 · National One-Eighth
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Wound healing in plants: role of the wound (secondary) meristem
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Sub-topic 14
2025 · National Semifinal
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Stifling: killing the silkworm pupa without damaging the cocoon shell
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Sub-topic 15
2026 · National One-Eighth
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Plant hormones: florigen and the flowering signal
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Sub-topic 16
2026 · National Quarterfinal
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Gibberellin's role in accelerating barley germination during malting
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Sub-topic 17
2018 · National Preliminary
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Structural support in monocot palm trees without wood
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Sub-topic 18
2023 · National Preliminary
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Gibberellin's role in accelerating barley germination during malting
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Sub-topic 19
2018 · National One-Eighth
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Plant hormones: identifying cytokinin from its effects
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Sub-topic 20
2021 · National Preliminary
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Characteristics of anabolic reactions
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Sub-topic 21
2026 · National Preliminary
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Riddle: the cocoon, a silk pupal casing spun by insect larvae
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Sub-topic 22
2026 · National Preliminary
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General properties of growth in organisms (true/false)
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Sub-topic 23
2025 · National One-Eighth
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General properties of growth in organisms (true/false)
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Sub-topic 24
2026 · National Preliminary
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Riddle: plant galls, abnormal tissue growths induced by pests or pathogens
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Sub-topic 25
2025 · National One-Eighth
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Riddle: plant galls, abnormal tissue growths induced by pests or pathogens
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Sub-topic 26
2023 · National Preliminary
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Ethylene as the hormone used for degreening of citrus fruits
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Sub-topic 27
2003 · National Semifinal
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Why a seed imbibing water is not considered biological growth
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Sub-topic 28
2003 · National Semifinal
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The sigmoid shape of a typical population/organism growth curve
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Sub-topic 29
2013 · National Preliminary
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Differentiation of function as the key advantage of multicellularity
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Sub-topic 30
2013 · National Preliminary
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Apical meristem activity lengthening roots and shoots
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Sub-topic 31
2013 · National Preliminary
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Vascular cambium (lateral meristem) activity increasing stem/root girth
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Sub-topic 32
2013 · National Quarterfinal
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Secondary growth increases stem/root width
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Sub-topic 33
2013 · National Quarterfinal
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Primary growth at apical meristems lengthens roots/shoots
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Sub-topic 34
2013 · National Quarterfinal
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Differentiation: cells becoming specialized in form and function
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Sub-topic 35
2016 · National One-Eighth
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During molting, only the outer cuticle is shed while inner layers are enzymatically digested (true/false)
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Sub-topic 36
2021 · National Preliminary
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Epigeal germination features rapid hypocotyl elongation, raising the cotyledons above soil
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Sub-topic 37
2022 · National Preliminary
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Structural features of meristematic cells near the root tip
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Sub-topic 38
2022 · National Preliminary
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The epidermal tissue's importance in plants: preventing water loss and infection
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Sub-topic 39
2022 · National Preliminary
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True or false: testa and tegmen are the two layers of a dicot seed coat
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Sub-topic 40
2022 · National Preliminary
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True or false: testa and tegmen can only be separated by soaking in water
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Sub-topic 41
2022 · National Preliminary
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True or false: the testa is the thin outer layer and tegmen the thick outer layer
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Sub-topic 42
2023 · National Preliminary
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The scutellum is the shell-shaped cartilaginous structure in a wheat grain embryo
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Sub-topic 43
2023 · National Preliminary
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The pupa is the resting, inactive stage in the insect life cycle
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Sub-topic 44
2023 · National One-Eighth
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Riddle: chlorenchyma, a living photosynthetic plant tissue
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Sub-topic 45
2023 · National Preliminary
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The five main groups of seed dormancy treatments
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