Cell biology
Molecular biology
Genetics
Ecology
Evolution and biodiversity
Human physiology
Nucleic acids (HL)
Metabolism, cell respiration and photosynthesis (HL)
Plant biology (HL)
Genetics and evolution (HL)
Animal physiology (HL)
Option A - Neurobiology and behaviour
Option B - Biotechnology and bioinformatics
Option C - Ecology and conservation
Option D - Human physiology
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What is ecology?
A branch of biology that studies the relationships between living organisms and their environment.