Biology 9700 Practical Notes ❲10000+ FRESH❳ Draw only the tissue layers (e.g., epidermis, xylem, phloem). No shading or sketching allowed. . Ensure units are converted to micrometers ( ) before calculating. 🧪 Core Skill 2: Biochemical Testing Aim for 50 minutes per question. If a microscope slide is giving you trouble, move to the calculation/theory part of the question. biology 9700 practical notes Random: Difficulty in judging a color change (end-point). Use a colorimeter or a standard color chart to improve this. 💡 Quick Tips for Exam Day Draw only the tissue layers (e Mastering the Biology 9700 Practical (Paper 3) Scoring an A in AS Level Biology often hinges on . This practical exam tests your ability to follow instructions, collect data, and analyze results under pressure. 🔬 Core Skill 1: Microscopic Techniques Ensure units are converted to micrometers ( ) Add Biuret reagent. Positive result: Blue → Purple/Violet.