Sub-topic 1
2024 · National Preliminary
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Vascular bundle types: collateral, bicollateral, open and closed; monocot vs dicot stems
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Sub-topic 2
2024 · National Preliminary
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Plant vascular tissue cell types: xylem and phloem cell structure and function
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Sub-topic 3
2026 · National Preliminary
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Bidirectional translocation of food in phloem
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Sub-topic 4
2026 · National Preliminary
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Bidirectional translocation of food in phloem
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Sub-topic 5
2025 · National Quarterfinal
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Organic compounds transported by phloem besides sugars
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Sub-topic 6
2021 · National Preliminary
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Riddle: companion cells and phloem loading
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Sub-topic 7
2026 · National Preliminary
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Guttation: exudation of water from leaf tips and edges
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Sub-topic 8
2024 · Regional Championship
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Tissue layers making up the periderm of tree bark
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Sub-topic 9
2026 · National One-Eighth
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Plant parts acting as sinks for mineral nutrient transport (true/false)
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Sub-topic 10
2026 · National Preliminary
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Bidirectional translocation of minerals in phloem tissue
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Sub-topic 11
2024 · National Preliminary
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Bidirectional translocation of minerals in phloem tissue
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Sub-topic 12
2026 · National Preliminary
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Whether sieve tube elements and companion cells are dead or alive at functional maturity (true/false)
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Sub-topic 13
2012 · National Preliminary
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Parenchyma cells composing the root cap
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Sub-topic 14
2012 · National Preliminary
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The cork cambium (phellogen) and secondary growth
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Sub-topic 15
2013 · National Preliminary
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Location of xylem and phloem within the leaf (midrib)
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Sub-topic 16
2013 · National Preliminary
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Sieve tube elements as the conducting cells of phloem
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Sub-topic 17
2013 · National Preliminary
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Xylem as the principal water-conducting tissue in plants
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Sub-topic 18
2013 · National Preliminary
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Riddle: xylem as a tissue of tracheids and vessel elements
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Sub-topic 19
2016 · National One-Eighth
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The vascular cambium separating xylem and phloem in dicot stems
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Sub-topic 20
2016 · National One-Eighth
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Root hairs as the main structure for water absorption
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Sub-topic 21
2016 · National One-Eighth
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Roots obtaining food via phloem transport from photosynthesizing leaves
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Sub-topic 22
2016 · National One-Eighth
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Problem of the day: demonstrating root pressure with eosin solution and glass tubing
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Sub-topic 23
2020 · National One-Eighth
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Distinguishing transpiration from evaporation by surface, process type, and rate
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Sub-topic 24
2021 · National Preliminary
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Roots obtain food via translocation from the plant's photosynthetic parts
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Sub-topic 25
2021 · National Quarterfinal
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Pits in tracheid walls connect adjacent cells, enabling water conduction
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Sub-topic 26
2022 · National Preliminary
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Hydathodes are the structures through which guttation exudes water droplets
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Sub-topic 27
2023 · National Preliminary
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True or false: transpiration transports mineral ions
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Sub-topic 28
2023 · National Preliminary
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True or false: transpiration keeps cells turgid, supporting herbaceous plants
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Sub-topic 29
2023 · National Preliminary
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True or false: transpiration supplies water for photosynthesis
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