Sub-topic 1
2026 · National Preliminary
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Simple vs compound leaves: lamina division
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Sub-topic 2
2026 · National Quarterfinal
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Location of fern spore cases (sori) on the underside of fronds
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Sub-topic 3
2024 · National One-Eighth
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Seedless vascular plants: azolla, spike moss and club mosses
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Sub-topic 4
2025 · National Preliminary
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Parts of the brown algae thallus: holdfast, blade and stipe
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Sub-topic 5
2003 · National Semifinal
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Plants with leaves modified for climbing (tendrils)
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Sub-topic 6
2003 · National Semifinal
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Plants with stems modified for water storage
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Sub-topic 7
2013 · National Preliminary
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Annual plants completing their life cycle in one growing season
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Sub-topic 8
2013 · National Preliminary
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Perennial plants with continued vegetative growth over many years
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Sub-topic 9
2013 · National Preliminary
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Biennial plants completing their life cycle over two growing seasons
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Sub-topic 10
2019 · National Preliminary
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Chlamydomonas as a genus of green algae
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Sub-topic 11
2019 · National Preliminary
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Pyrenoids located within algal chloroplasts
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Sub-topic 12
2021 · National Quarterfinal
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Apple, pear and tomato are all classified as simple fruits
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