Cambridge IGCSE Biology Practical Skills Workbook

by Salma Siddiqui

Overview

This series is endorsed by Cambridge International to support the full syllabus for examination from 2023. Improve scientific enquiry and practical skills with suggested key experiments and simple, structured guidance. The Practical Skills Workbook provides additional support for the accompanying Cambridge IGCSE™ Biology Textbook. - Become accomplished scientists: the workbook provides a series of investigations with step-by-step guidance which leads you through the method and the use of apparatus, complete with safety notes. - Improve the quality of written work: guidance, prompts and write in frames provided throughout to help you record your observations, interpret data and evaluate the experiment. - Develop understanding and build confidence: plenty of exam-style questions are provided for preparation for practical exams or alternatives, whilst 'Going Further' questions encourage you to stretch yourself.

Product Details

ISBN-13:	9781398310469
Publisher:	Hodder Education Group
Publication date:	05/25/2021
Pages:	128
Product dimensions:	8.27(w) x 11.65(h) x 0.31(d)
Age Range:	18 Years

Table of Contents

Introduction 5

Experimental skills and abilities 7

1 Characteristics and classification of living organisms 17

1.1 Dichotomous keys 17

2 Organisation of the organism 20

2.1 Looking at plant cells 20

2.2 Looking at animal cells 23

3 Movement into and out of cells 26

3.1 Osmosis and water flow 26

3.2 Observing osmosis in potato tissue 28

3.3 Osmosis and turgor 32

3.4 Plasmolysis 35

4 Biological molecules 38

4.1 Food tests 38

4.2 Application of food tests 41

5 Enzymes 44

5.1 Testing the effect of high temperature on an enzyme 44

5.2 The effect of temperature on enzyme reaction 46

5.3 The effect of pH on enzyme reaction 49

6 Plant nutrition 53

6.1 The importance of different mineral ions for plant growth 53

6.2 Is chlorophyll necessary for photosynthesis? 55

6.3 Is light necessary for photosynthesis? 58

6.4 Is carbon dioxide necessary for photosynthesis? 61

6.5 Gas exchange during photosynthesis 64

6.6 The effect of light intensity on the rate of photosynthesis 66

7 Transport in plants 70

7.1 Transport in vascular bundles 70

7.2 Rates of water uptake in different conditions 72

7.3 Which surface of a leaf loses more water vapour? 75

8 Transport in animals 78

8.1 Investigating the effect of exercise on pulse rate 78

9 Gas exchange in humans 81

9.1 Oxygen in exhaled air 81

9.2 Carbon dioxide in exhaled air 83

10 Respiration 86

10.1 Investigating the effect of temperature on respiration in yeast 86

11 Coordination and response 90

11.1 Investigating gravitropism in peas or beans 90

11.2 Investigating phototropism in shoots 92

12 Reproduction 95

12.1 Insect-pollinated flowers 95

12.2 Germination: the need for water 97

12.3 Temperature and germination 99

13 Variation and selection 102

13.1 Investigating variation between people in the class 102

14 Biotechnology and genetic modification 106

14.1 The effect of pectinase on fruit pulp 106

14.2 Investigating the use of biological washing powders that contain enzymes 109

Past paper questions 112

Practical test past paper questions 112

Alternative to Practical past paper questions 121