In the 2020 practical, you were given a slide of a transverse section (e.g., dicot stem or onion root tip).
| pH | Color Change | Amylase Activity | | --- | --- | --- | | 4 | Blue-black | Low | | 5 | Purple | Moderate | | 6 | Brown | High | | 7 | Yellow-brick red | Very high | | 8 | Yellow-brick red | Very high | o level biology practical 2020 answers
Needs heating. A positive result changes from blue to green, yellow, or brick-red. In the 2020 practical, you were given a
Students were tested on their ability to design a fair test. Independent Variable: What you change (e.g., temperature). In the 2020 practical
2020 O-Level Biology Practical Guide | PDF | Flowers - Scribd