O Level Biology | Practical 2020 Answers

Draw a smooth curve or a straight line; do not connect dots with "dots-and-dashes."

This comprehensive guide breaks down the core experiments from the 2020 sessions, details the suggested answers, and highlights key practical skills to help you secure a distinction. Core Experiments and Suggested Answers from 2020 o level biology practical 2020 answers

Use a colorimeter to measure light absorbance or transmittance quantitatively, removing human bias. 3. Measuring Small Volumes Draw a smooth curve or a straight line;

A transverse section of a lime fruit . Marks were awarded for clear, continuous lines, occupying at least half the provided space, and realistic details like the juicy pulp and green skin. Measuring Small Volumes A transverse section of a

Students were provided with plant tissue samples (often potato cylinders or similar vegetative structures) and asked to submerge them in varying concentrations of solutions or test their reaction with specific reagents like hydrogen peroxide (to study catalase activity) or iodine (to study starch distribution).

Dissolve sample in ethanol, shake vigorously, then pour the liquid into a test tube containing cold water. A clear solution turns into a . ✏️ Question 2: Biological Drawings & Microscopy

Mastering the O-Level Biology Practical (2020 Edition): Answers, Insights, and Exam Strategies