Biology

Which level are you studying?

HL adds extra depth — nucleic acid detail, and the biochemistry of respiration and photosynthesis — on top of the core SL topics. Choose your level to see the right set of questions.

BIOLOGY SL6 topics

Biology SL

Use biological terminology precisely and connect evidence to mechanisms.

122 activities394 practice marks

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BIOLOGY HL5 topics

Biology HL

HL-only depth: nucleic acids and metabolism, plant biology, genetics and evolution, and animal physiology.

102 activities354 practice marks

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Not sure which level you're in? Check your subject registration or ask your teacher or IB coordinator.