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Biology Revision

Cells, body systems & ecosystems — part of Science on KODO.

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Biology is a core area of Science in the national curriculum. It covers essential concepts that build the foundation for GCSE study and beyond.

This topic includes subtopics such as Cells and microscopes, Human body systems (circulatory, digestive, respiratory), Plants and photosynthesis, Ecosystems and food chains and more. Each area is tested with multiple-choice questions that include detailed explanations to deepen your understanding.

Quick Reference

Plant cell extrasCell wall, chloroplasts, large vacuole
Photosynthesis equation6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Aerobic respirationGlucose + O₂ → CO₂ + H₂O + energy
DNA locationNucleus of the cell

Key Definitions

Cell
The basic building block of all living organisms.
Photosynthesis
The process plants use to convert light energy into glucose: CO₂ + H₂O → C₆H₁₂O₆ + O₂
Respiration
The process cells use to release energy from glucose: C₆H₁₂O₆ + O₂ → CO₂ + H₂O + energy
Diffusion
The net movement of particles from an area of high concentration to low concentration.
Ecosystem
A community of living organisms interacting with their physical environment.

What You'll Cover

Cells and microscopes
Human body systems (circulatory, digestive, respiratory)
Plants and photosynthesis
Ecosystems and food chains
Reproduction and variation
Cells and cell structures
Body systems (digestion, circulation, respiration)
Photosynthesis
Genetics and inheritance

Test Yourself — Biology

Try 3 quick questions. No account needed.

Quick Quiz

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Memory Tricks & Mnemonics

"MRS GREN" — Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition

The 7 characteristics of living things.

"Richard Of York Gave Battle In Vain" — but for Biology: cells → tissues → organs → organ systems → organisms

The levels of organisation in living things.

Frequently Asked Questions

What is Cells and microscopes in Science Biology?+
Cells and microscopes is a key subtopic within Biology in Science. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
What is Human body systems (circulatory, digestive, respiratory) in Science Biology?+
Human body systems (circulatory, digestive, respiratory) is a key subtopic within Biology in Science. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
What is Plants and photosynthesis in Science Biology?+
Plants and photosynthesis is a key subtopic within Biology in Science. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
What is Ecosystems and food chains in Science Biology?+
Ecosystems and food chains is a key subtopic within Biology in Science. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
What is Reproduction and variation in Science Biology?+
Reproduction and variation is a key subtopic within Biology in Science. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
How many Biology questions does KODO have?+
KODO's Biology question bank is AI-powered and continuously expanding. Questions are multiple-choice with four options and include detailed explanations for every answer.
Is Biology revision on KODO free?+
Yes! KODO offers free daily quiz sessions for all topics including Biology. Revision cards are completely free with no limits. Pro users get unlimited quizzes and additional features.

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