IB Biology HL
Key Concepts
In the IB Biology HL (Higher Level) Key Concepts section, you will find summary videos that will help you review the most important concepts and skills necessary for success. They are ideal for a quick refresher before tackling questions in the Revision Village Questionbank or Practice Exams sections of the website.
Water
15 mins
Nucleic Acids
13 mins
Cell Structure and Function
11 mins
Evolution and Speciation
14 mins
Diversity of Organisms
25 mins
Theme A
Unity and Diversity
Water
15 mins
Nucleic Acids
13 mins
Cell Structure and Function
11 mins
Evolution and Speciation
14 mins
Diversity of Organisms
25 mins
Carbohydrates and Lipids
12 mins
Structure and Function of Proteins
18 mins
Membrane Structure
10 mins
Membrane Transport
9 mins
Membranes: Structure & Transport - HL
12 mins
Organelles and Compartmentalisation
11 mins
Cell Specialisation
15 mins
Organelle Function and the Ultracentrifuge
2 mins
The Respiratory System
10 mins
The Cardiovascular System
22 mins
Plant Transport
17 mins
Muscle and Motility I
7 mins
Muscle and Motility II
10 mins
Ecological Niches
16 mins
Adaptations to environment
18 mins
Theme B
Form and Function
Carbohydrates and Lipids
12 mins
Structure and Function of Proteins
18 mins
Membrane Structure
10 mins
Membrane Transport
9 mins
Membranes: Structure & Transport - HL
12 mins
Organelles and Compartmentalisation
11 mins
Cell Specialisation
15 mins
Organelle Function and the Ultracentrifuge
2 mins
The Respiratory System
10 mins
The Cardiovascular System
22 mins
Plant Transport
17 mins
Muscle and Motility I
7 mins
Muscle and Motility II
10 mins
Ecological Niches
16 mins
Adaptations to environment
18 mins
Enzymes
11 mins
Cellular Respiration
12 mins
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Cellular Respiration [HL]
12 mins
Photosynthesis
14 mins
Photosynthesis HL
14 mins
The Electron Transport Chain and Chemiosmosis
8 mins
Carbon Dioxide Enrichment Experiments
3 mins
Neural Signaling - Impulse
10 mins
Neural Signaling - Synapse
7 mins
Defense Against Disease - Part 1
6 mins
Defense Against Disease - Part 2
9 mins
Populations and Communities - Quantitative Ecology - Part 2
13 mins
Energy in Ecosystems
8 mins
Carbon Cycle
11 mins
Theme C
Interaction and Interdependence
Enzymes
11 mins
Cellular Respiration
12 mins
Cellular Respiration [HL]
12 mins
Photosynthesis
14 mins
Photosynthesis HL
14 mins
The Electron Transport Chain and Chemiosmosis
8 mins
Carbon Dioxide Enrichment Experiments
3 mins
Neural Signaling - Impulse
10 mins
Neural Signaling - Synapse
7 mins
Defense Against Disease - Part 1
6 mins
Defense Against Disease - Part 2
9 mins
Populations and Communities - Quantitative Ecology - Part 2
13 mins
Energy in Ecosystems
8 mins
Carbon Cycle
11 mins
DNA Replication
9 mins
Protein Synthesis
9 mins
Codons, Degeneracy, and Sickle Cell
10 mins
Mitosis, Cytokinesis & The Cell Cycle
18 mins
Cell Cycle - Mutagens & Cancer
9 mins
Gene Expression
19 mins
Water Potential
11 mins
Homeostasis, Hormones and the Menstrual Cycle
10 mins
Animal Reproduction
12 mins
Pregnancy Testing by hCG Detection
2 mins
Reproduction in Flowering Plants
10 mins
Inheritance
16 mins
Mendelian Genetics
7 mins
Homeostasis
11 mins
Thermoregulation
2 mins
Osmoregulation and Excretion
16 mins
Natural Selection
13 mins
Climate Change
15 mins
Theme D
Continuity and Change
DNA Replication
9 mins
Protein Synthesis
9 mins
Codons, Degeneracy, and Sickle Cell
10 mins
Mitosis, Cytokinesis & The Cell Cycle
18 mins
Cell Cycle - Mutagens & Cancer
9 mins
Gene Expression
19 mins
Water Potential
11 mins
Homeostasis, Hormones and the Menstrual Cycle
10 mins
Animal Reproduction
12 mins
Pregnancy Testing by hCG Detection
2 mins
Reproduction in Flowering Plants
10 mins
Inheritance
16 mins
Mendelian Genetics
7 mins
Homeostasis
11 mins
Thermoregulation
2 mins
Osmoregulation and Excretion
16 mins
Natural Selection
13 mins
Climate Change
15 mins
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More IB Biology HL Resources
Frequently Asked Questions
What are the Biology HL Key Concepts?
The IB Biology Higher Leve Key Concepts section is one of the five main features available on Revision Village for Biology HL students, alongside the Questionbank, Data-based Questions, Practice Exams, and Past Papers. The Key Concepts section offers a carefully curated set of Biology HL exam revision videos designed to help students review specific concepts, such as “The Cardiovascular System”, that they may have missed or misunderstood in class. Each video is typically 10 to 15 minutes long, providing a concise and efficient way to reinforce key topics before applying knowledge through exam-style questions in the Questionbank, Data-based Questions, or Practice Exams sections of the Revision Village website.
How should I best use the Biology HL Key Concepts?
A great way to improve in IB Higher Level Biology is through consistent practice with exam-style questions. However, it’s easy to forget key concepts along the way. To reinforce understanding, students are encouraged to use the Biology HL Key Concept videos alongside their practice. Stuck on a specific question? Head to the Key Concepts section and watch a revision video that covers the relevant theory. Then, return to the original question and try solving it again with a fresh perspective.
Do the Biology HL Key Concept videos replace my textbook?
This is not the aim of the Biology Higher Level Key Concept section on Revision Village. These videos are short and concise and aim to ‘recap’ the theory, as opposed to teaching and explaining the theory, which is the purpose of textbooks. The goal of the Biology HL Key Concept section on Revision Village is to support students in their revision by offering a quick and effective way to review frequently tested topics in IB Biology Higher Level examinations.
Who are the teachers in the Biology HL Key Concept videos?
The Biology Higher Level Key Concept videos on Revision Village are taught by experienced IB Biology teachers and examiners, who are passionate about teaching IB Biology HL concepts in a simple, intuitive and engaging manner. The team is dedicated to helping each and every student achieve their best possible IB Biology grade.