O Level Biology Practical 2020 Answers Jun 2026

Water exits the plant cells via osmosis. The vacuole shrinks, pulling the cell membrane away from the cell wall (plasmolysis). The tissue strips become flaccid, shorter, and highly pliable. Biological Drawing Mastery

The factor you change deliberately (e.g., testing at 20°C, 30°C, 40°C, 50°C, and 60°C using regulated water baths).

Magnification=Size of Image (Drawing)Actual Size of SpecimenMagnification equals the fraction with numerator Size of Image (Drawing) and denominator Actual Size of Specimen end-fraction Steps to Solve: Measure the length of your drawing in millimeters ( o level biology practical 2020 answers

1. The Beetroot Membrane Permeability Experiment (May/June Paper 31/32)

A significant portion of the marks depended on a freehand drawing of a provided biological specimen or photomicrograph. Cambridge examiners look for strict adherence to standard biological drawing conventions: Water exits the plant cells via osmosis

The O Level Biology Practical examination is a crucial assessment for students pursuing biology at the ordinary level. The 2020 practical examination presented various challenges to students, and with the release of the answers, it has become essential to provide a detailed analysis and guide for students to understand the marking scheme and improve their performance.

| Exam Series | Paper Code | Paper Type | Availability | |-------------|------------|------------|--------------| | May/June 2020 | 5090/61 | Alternative to Practical | Question paper + mark scheme available | | October/November 2020 | 5090/31 | Practical Test | Question paper available | | October/November 2020 | 5090/61 | Alternative to Practical | Question paper available | Cambridge examiners look for strict adherence to standard

A recurring question type in O-Level Biology Practicals asks students to identify flaws in the methodology and propose realistic modifications. 1. Temperature Fluctuations

This is often the most distinguishing section of the paper.

Example: "Suggest how the investigation could be improved."