Interpret resolution limit
Two organelles in a organelle fractionation practical are visible as separate dots under an electron microscope but blur together under a light microscope. Explain the image-data reason. Use the diagram labels, HL model, or quantitative image evidence before answering. Enter the answer and choose the interpretation that best matches the HL biological evidence.
Worked practice: biological evidence and answer
Use the labelled biological evidence first, then connect it to the final answer.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.