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• Weblinks
• 7691 - Stretch & Challenge Articles for OCR A GCSE Biology Pack 1

Weblinks and videos for use with 7691 – Stretch & Challenge Articles for OCR A GCSE Biology Pack 1

Microscopes – from Spectacles to Single Atoms

• Electron Microscopes

The Very Hungry Eukaryote!

• Endosymbiosis

The Life and Times of Good Bacteria

• The Good Bacteria

Cracking the Code: Learning from DNA

• National Human Genome Research Institute: DNA

Digestive Enzymes, Clean Clothes and Smelly Cheese

• Industrial Uses of Enzymes

The Oxygen Apocalypse!

• The Origin of Oxygen in the Earth's Atmosphere

Lactic Acid – the Enemy of Athletes?

• Article: Lactic Acid Not Athlete's Poison

The Life Osmotic

• Osmoregulation in Freshwater Fish

Stem Cells – Growing the Future of Medicine

• Stem Cells: Science and Ethics

Catching a Breath

• Animal Respiration

Having a Change of Heart

• British Heart Foundation

Diseases of Blood: Sickle-cell Disease

• Sickle-cell Disease

Carnivores in the Plant World

• Carnivorous Plant Facts

Sights for Sore Eyes

• Eye Conditions

The Male Pill? Approaches to Male Contraceptive Agents

• NHS Choices: Contraception Guide

Sweet Dream Monotremes – Platypus Venom and Diabetes

• Diabetes UK