Assuming surface is required, and area is required, the following results were found.
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Measuring rate of water uptake by a plant shoot using a potometer
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Effect of size on uptake by diffusion
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Changes in earthworm responsiveness
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Making a streak plate
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Aseptic techniques
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Investigating photosynthesis using immobilised algae
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Observing blood circulation in Asellus
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How good is your toilet paper?
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Investigating factors affecting the heart rate of Daphnia
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Using a choice chamber to investigate animal responses to stimuli
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Structure of synovial joint with tendons and ligaments
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Maintaining and preparing cultures of bacteria and yeasts
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Observing earthworm locomotion
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Investigating mitosis in allium root tip squash
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Gene induction: ß-galactosidase in E. coli
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Recording variation in ivy leaves
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Extracting DNA from living things
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Investigating effect of temperature on the activity of lipase
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Identifying the conditions needed for photosynthesis
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A window on the past: Measuring stomatal density