996 past contests
Topic 24 · What viviparity is not: hypogeal/epigeal germination and parthenocarpy (true/false)
Topic 29 · Riddle: hemiptera, the true bugs
Topic 33 · Active sodium reabsorption in the proximal convoluted tubule
Topic 29 · Termite biology: cellulose digestion, caste social structure, and soldier vs worker roles (true/false)
Topic 25 · Riddle: gametogenesis
Topic 39 · Main ecological effect of eutrophication: reduced dissolved oxygen
Topic 29 · Important nematode parasites of humans
Topic 41 · Adaptive benefits of gut-parasite features: flat body, egg number, anaerobic respiration
Topic 25 · External fertilization and parental care across various animal and plant groups (true/false)
Topic 53 · Riddle: mendel's law of segregation, from pea plant experiments
Topic 35 · Reversing plasmolysis by osmosis in isotonic, saturated or hypotonic solutions (true/false)
Topic 33 · Water impermeability of the ascending limb of the loop of henle
Topic 37 · Water storage efficiency: root-zone water retained versus irrigation water delivered
Topic 13 · Honeybee mouthparts used in molding beeswax
Topic 24 · Edible parts of fruits: pericarp layers
Topic 8 · Gibberellin's role in accelerating barley germination during malting
Topic 12 · Riddle: ecology, the study of organism-environment interactions
Topic 3 · Problem of the day: limiting factors on a light-intensity vs photosynthesis-rate curve
Topic 27 · Survival strategies of bacteria, fungi and lower plants under adverse conditions (true/false)
Topic 8 · Insect life cycle and metamorphosis