996 past contests
Topic 11 · Divergent evolution: a common ancestor's descendants growing dissimilar
Topic 38 · Ammonia as the product of ammonification
Topic 53 · Riddle: genetic linkage, an exception to independent assortment
Topic 7 · Monocot leaves show parallel, not reticulate, venation (true/false)
Topic 7 · Bulliform cells are present, not absent, in the monocot leaf epidermis (true/false)
Topic 7 · Monocot leaf mesophyll is undifferentiated, unlike the palisade/spongy layers of dicots (true/false)
Topic 11 · Dna analysis and comparative anatomy, but not radiometric dating alone, placing a fossil in human phylogeny (true/false)
Topic 29 · Hooks and suckers as tapeworm attachment structures
Topic 49 · Mammals as endotherms, generating body heat from metabolism
Topic 32 · The biological species concept: interbreeding and viable seed/offspring production
Topic 24 · Identifying drupes by their stony endocarp
Topic 24 · The caryopsis (grain), a one-seeded fruit fused to its seed coat
Topic 24 · The fleshy mesocarp as the edible part of mango fruit
Topic 9 · Hyaline cartilage at the ends of long bones
Topic 9 · Cartilaginous joint between the ribs and sternum
Topic 20 · Location of the intercostal muscles
Topic 5 · Lactic acid and alcoholic fermentation as the two main anaerobic respiration types
Topic 33 · Blood urea nitrogen as a marker of protein breakdown
Topic 14 · Structures distal to the knee in mammals
Topic 43 · Riddle: the intertidal zone, exposed at low tide and submerged at high tide