Biology

Explore the science of life from molecular foundations to complex ecosystems. Build your knowledge and problem-solving skills for the IJSO biology section.

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Cell Biology

Cellular and Micro Biology

Cell structure, function, and processes

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Molecular

Molecular Biology

Invisible world that governs all living organisms

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Human Biology

Human Biology

Human structure, function, and behavior

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Zoology

Zoology

Animal structure, function, and behavior

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Botany

Botany

Plant structure, function, and diversity

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Genetics

Genetics

Inheritance, DNA, and genetic mechanisms

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Ecology and Environment

Ecology

Interactions between organisms and environment

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Microbiology and Biotechnology

Evolutionary Development

Learn the links in developmental changes to evolutionary relationships.

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Test your readiness with IJSO-style biology mock tests

Simulate the real exam experience with full-length biology mock tests crafted in the spirit of the IJSO.

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