Edexcel OLevel Biology revision notes

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Lesson

Lesson-2.1.1- describe the levels of organisation in organisms: organelles, cells, tissues, organs and systems.

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Lesson-1.1.6- understand the term pathogen and know that pathogens may include fungi, bacteria, protoctists or viruses.Previous Lesson-2.1.2- describe cell structures, including the nucleus, cytoplasm, cell membrane, cell wall, mitochondria, chloroplasts, ribosomes and vacuole.Next