996 past contests
Topic 45 · True or false: gibberellins promote germination via letting water through the hard seed coat
Topic 45 · True or false: gibberellins promote germination by stimulating abscisic acid synthesis
Topic 27 · True or false: bacteria, fungi and lower plants survive adversity via thick-walled spores
Topic 27 · True or false: bacteria, fungi and lower plants survive adversity via migration
Topic 27 · True or false: bacteria, fungi and lower plants survive adversity via suspended growth
Topic 3 · Problem of the day: light as a limiting factor on a photosynthesis-rate-vs-light-intensity curve
Topic 8 · The pupa is the resting, inactive stage in the insect life cycle
Topic 8 · The scutellum is the shell-shaped cartilaginous structure in a wheat grain embryo
Topic 2 · Prokaryotic cells resist osmotic shock better than eukaryotic cells due to their rigid cell wall
Topic 5 · The krebs cycle takes place in the mitochondrial matrix
Topic 5 · Glycolysis takes place in the cytoplasm
Topic 5 · Oxidative phosphorylation takes place at the inner mitochondrial membrane
Topic 53 · Riddle: the law of segregation, established via mendel's pea-plant experiments
Topic 9 · The joint between vertebrae is a cartilaginous joint
Topic 9 · The joint between the carpal and metacarpal bones of the thumb is a saddle joint
Topic 9 · The joint between flat skull bones is a suture (fibrous joint)
Topic 39 · Riddle: water vapor, the most abundant greenhouse gas
Topic 25 · True or false: echinodermata and mosses both exhibit external fertilization with parental care
Topic 33 · True or false: kidney-damage anemia occurs because iron and vitamin b12 can't bind hemoglobin
Topic 25 · True or false: reptiles and gymnosperms both exhibit external fertilization