1,This workbook is a revised edition ofthe'Practical Worksheets for CXC Biology' developed in 1983. Many of the experiments in the original booklet have been replaced. The mark schemes have been comi.letelyoverhauled to fit in with the CXC Biology SBA criteria. 2. In addition abrief section with some guidelines on SBA have been included. Some of the most important types of microscopes that used in biology are as follows: 1. Simple microscope 2. Compound microscope 3. Electron microscopes 4. Phase-Contrast microscope 5. Interference microscope. The simple dissection microscope to advanced electron microscopes finds application in studies of living organisms. Adequate containment of cultures; class practical work vs. teacher demonstration Composition of culture media Possibility of selecting for growth of pathogens Volume of cultures Increased risk with increase in volume of liquid culture Laboratory facilities Suitability for level of practical microbiological work Equipment Adequate for purpose Book description. Originally published in 2005, this unique resource presents 27 easy-to-follow laboratory exercises for use in student practical classes in developmental biology. These experiments provide key insights into developmental questions, and many of them are described by the leaders in the field who carried out the original research. Students must need to perform all class 12 biology practical to get good grades in the final practice exam. Experiment No. Aim. Experiment 1. To study and analyze the reproductive sections of the commonly available flowers. Experiment 2. To study and determine the percentage of the pollen germination. Experiment 3. PRACTICAL NO.2 Simple laboratory tests to identify starch, non -reducing sugars, reducing sugars , proteins, fats and oils. Expected Learning Outcomes 1. Conducts tests to identify given food materials. 2. Follows laboratory procedures accordingly . 3. Conducts experiments with due care. 4. Records procedures and observations. 5. 1 Planning the experiment 2 Setting up / manipulating apparatus 3 Making measurements and observations 4 Recording and presenting observations and data 5 Analysing data and drawing conclusions 6 Evaluating procedures 7 Evaluating conclusions Examples of uncertainties 51 Worked examples 51 Multiple measurements 51 Recording measurements 52 Consistency of presentation of raw data 52 Presentation of results 52 Table headings 52 Significant figures 53 How many significant figures should be used? 53 Rounding off 53 How do we know the number of significant figures? 53 Teaching A Level Biology Practical Skills in preparation for 9700 paper 5 Your attention is drawn to the section on Risk Assessment on page 15 of the made to ensure that appropriate safety indications are given, CIE accepts no responsibility for the safety of these experiments and it is the responsibility of the teacher to carry out a full not used practical activities available on their book at all while 8.8% of them responded as they always use practical activities. Performed practical activities from text book Figure 4 shows the percentage performed practical 19.8 34.7 33 30.5 100 80.2 65.3 67 69.5 0 0 20 40 60 80 100 120 Bule Hora Fincawa Yabello Gerba Kilenso BCH361 [Practical] Biochemistry department 0 Molecular Biology -Practical- (BCH 361)- Handout. 1 Table of Contents Introduction to Molecular Biology _____1 For conducting a successful molecular biol