O Level Biology Practical 2020 Answers

. The task seemed simple enough on paper—investigate the effect of temperature on the rate of respiration—but his hands were shaking as he gripped the pipette.

: As temperature increased, the surrounding water became a progressively darker shade of red. Expected Answers & Scientific Explanation : o level biology practical 2020 answers

| Sucrose (M) | Final length (mm) | Change (mm) | | :--- | :--- | :--- | | 0.0 | +3 | Increase | | 0.2 | +1 | Increase | | 0.4 | 0 | No change | | 0.6 | -2 | Decrease | | 0.8 | -4 | Decrease | Expected Answers & Scientific Explanation : | Sucrose

Gas loss from the delivery tube before the rubber bung could be fully sealed. so the strips maintain original turgidity.

The GCE O Level Biology Practical Exam (Syllabus 6093/5090) is a crucial component for students aiming to secure an A1. The 2020 practical exam tested foundational biological principles through hands-on experimentation, data collection, and critical analysis.

The 0.2M sucrose solution has the same water potential as the potato cells. Therefore, there is no net movement of water into or out of the cells, so the strips maintain original turgidity.