Sub-topic 1
2026 · National Quarterfinal
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Dinoflagellates as the cause of red tide
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Sub-topic 2
2021 · National Preliminary
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Feeding structures in paramecium: the oral groove
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Sub-topic 3
2024 · Regional Championship
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Identifying a kingdom (protista, fungi, animalia) from a descriptive clue about cell organization
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Sub-topic 4
2023 · National Preliminary
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Peptidoglycan cell walls and prokaryotic resistance to osmotic shock
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Sub-topic 5
2023 · National Preliminary
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Survival strategies of bacteria, fungi and lower plants under adverse conditions (true/false)
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Sub-topic 6
2022 · National Preliminary
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Plasmodium species and the sexual/asexual stages of its life cycle
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Sub-topic 7
2012 · National Preliminary
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Relative sizes of bacteria and viruses
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Sub-topic 8
2012 · National Preliminary
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Poliomyelitis and measles are caused by viruses, not bacteria
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Sub-topic 9
2013 · National Preliminary
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Intracellular digestion in single-celled organisms (true/false)
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Sub-topic 10
2013 · National Preliminary
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Riddle: euglena as a flagellated mixotrophic protist
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Sub-topic 11
2013 · National Preliminary
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Riddle: protozoa as diverse, often motile unicellular eukaryotes
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Sub-topic 12
2013 · National Semifinal
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Riddle: the bacterial endospore and its role in anthrax
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Sub-topic 13
2016 · National One-Eighth
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Riddle: lichen as a fungus-algae/cyanobacteria symbiosis
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Sub-topic 14
2016 · National Preliminary
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Problem of the day: demonstrating culturable microorganisms in exhaled breath
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Sub-topic 15
2017 · National Quarterfinal
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Viruses can mutate, so the claim they can't is false (true/false)
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Sub-topic 16
2017 · National Quarterfinal
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Viruses lack their own ribosomes, relying on the host's (true/false)
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Sub-topic 17
2022 · National Preliminary
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True or false: cilia are used as locomotory organs by protozoa
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Sub-topic 18
2022 · National Preliminary
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True or false: parapodia are used as locomotory organs by protozoa
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Sub-topic 19
2022 · National Preliminary
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True or false: a flagellum is used as a locomotory organ by protozoa
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Sub-topic 20
2023 · National Preliminary
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True or false: bacteria, fungi and lower plants survive adversity via suspended growth
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Sub-topic 21
2023 · National Preliminary
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True or false: bacteria, fungi and lower plants survive adversity via migration
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Sub-topic 22
2023 · National Preliminary
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True or false: bacteria, fungi and lower plants survive adversity via thick-walled spores
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