13 Coordination and response
161
20 Organisms and their environment 264
13.1 Coordination in animals 13.2 The human nervous system 13.3 Receptors 13.4 The endocrine system 13.5 Coordination and response in plants
162 162 165 170 172
20.1 Ecology 265 20.2 Energy flow 265 20.3 Nutrient cycles 270 20.4 Population size 272
178
21.1 What is biotechnology? 281 21.2 Using yeast 281 21.3 Making use of enzymes 282 21.4 Penicillin 284 21.5 Genetic engineering 286
14 Homeostasis 14.1 Maintaining the internal environment 14.2 Control of body temperature 14.3 Control of blood glucose concentration
15 Drugs
188
15.1 What is a drug? 15.2 Medicinal drugs 15.3 Misuse of drugs 15.4 Tobacco smoking
189 189
190 192
16 Reproduction in plants 16.1 Asexual reproduction 16.2 Sexual reproduction 16.3 Sexual reproduction in flowering plants 16.4 Comparing sexual and asexual reproduction
17 Reproduction in humans 17.1 Human reproductive organs 17.2 Fertilisation and development 17.3 The menstrual cycle 17.4 Birth control 17.5 Sexually transmitted infections
18 Inheritance
179 179 184
197 198 198 200 208
212 213 215 220 222 225
230
18.1 Chromosomes 231 18.2 Cell division 231 18.3 Inheritance 235 18.4 DNA and protein synthesis 243
19 Variation and natural selection 247 19.1 Variation 248 19.2 Adaptive features 250 19.3 Selection 253
iv
Cambridge IGCSE Biology
21 Biotechnology
22 Humans and the environment
280
292
22.1 Food production 293 22.2 Habitat destruction 296 22.3 Pollution 299 22.4 Conservation 307
Answers to questions
318
Glossary 330 Index 339 Acknowledgements 000 Terms and Conditions of use for the CD-ROM CD-ROM Activities Notes on activities for teachers/technicians Self-assessment checklists Answers to end-of-chapter questions Study and revision skills Revision checklists Self-assessment tests Model papers and mark schemes Help Notes Animations
Original material © Cambridge University Press 2014
000