Pearson Edexcel International Advanced Level Biology Notes

Follow the official modular unit structure and the qualification combination registered by your centre.

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Last updated: 2026-10-03

Modular Pearson IAL Biology notes for WBI11-WBI16, with IAS and full IAL boundaries identified.

Pearson Edexcel International Advanced Level: Biology WBI11-WBI16.

Preparing for a 2026 or 2027 entry? Check the current specification and your centre's entry code, units and exam series. The specification's publication year is not your examination year.

Check IAS versus the full IAL award and the exact unit combination. Do not use Singapore H2 or Cambridge subject codes for this qualification.

Choose the right route

Official Biology modular units

Pearson IAL Biology theory notes

Syllabus Breakdown

IAS theory

Unit 1: Molecules, Diet, Transport and Health
Unit 2: Cells, Development, Biodiversity and Conservation

IA2 theory

Unit 4: Energy, Environment, Microbiology and Immunity
Unit 5: Respiration, Internal Environment, Coordination and Gene Technology

Year	Key Topics Covered
IAS theory	Unit 1: Molecules, Diet, Transport and Health Unit 2: Cells, Development, Biodiversity and Conservation
IA2 theory	Unit 4: Energy, Environment, Microbiology and Immunity Unit 5: Respiration, Internal Environment, Coordination and Gene Technology

Frequently Asked Questions

What belongs in this notes hub?
This page has Pearson Edexcel International Advanced Level theory notes and study plans for Biology WBI11-WBI16. Use the linked practical page for experimental skills.
How do I check which syllabus to use?
Use the official syllabus linked near the top of this page. Check that Biology WBI11-WBI16 and the syllabus edition match your examination entry before using these resources.
Where do I go for practical preparation?
Use the paired practical hub linked near the top of this page. Keeping the two routes separate makes it clearer whether you need subject knowledge or experimental skills.

Pearson Edexcel International Advanced Level Biology Notes

Choose the right route

Official Biology modular units

1) Unit 1: Molecules, Diet, Transport and Health

2) Unit 2: Cells, Development, Biodiversity and Conservation

Pearson IAL Biology theory notes

Syllabus Breakdown

IAS theory

IA2 theory

Frequently Asked Questions

3) Unit 4: Energy, Environment, Microbiology and Immunity

4) Unit 5: Respiration, Internal Environment, Coordination and Gene Technology

Pearson Edexcel International Advanced Level Biology Notes

Choose the right route

Official Biology modular units

1) Unit 1: Molecules, Diet, Transport and Health

2) Unit 2: Cells, Development, Biodiversity and Conservation

Pearson IAL Biology theory notes

Pearson International A Level Biology Unit 1: Molecules, Diet, Transport and Health

Pearson International A Level Biology Unit 2: Cells, Development, Biodiversity and Conservation

Pearson International A Level Biology Unit 4: Energy, Environment, Microbiology and Immunity

Pearson International A Level Biology Unit 5: Respiration, Internal Environment, Coordination and Gene Technology

Pearson IAL Biology theory notes

Syllabus Breakdown

IAS theory

IA2 theory

Frequently Asked Questions

Pearson IAL Biology theory notes

Pearson International A Level Biology Unit 1: Molecules, Diet, Transport and Health

Pearson International A Level Biology Unit 2: Cells, Development, Biodiversity and Conservation

Pearson International A Level Biology Unit 4: Energy, Environment, Microbiology and Immunity

Pearson International A Level Biology Unit 5: Respiration, Internal Environment, Coordination and Gene Technology

3) Unit 4: Energy, Environment, Microbiology and Immunity

4) Unit 5: Respiration, Internal Environment, Coordination and Gene Technology