1．ANIMALS AND PLANTS 1
2．LIVING THINGS AND ENERGY 9
3．THE SOURCE OF THE ENERGY USED BY LIVING THINGS 18
4．HOW A PLANT OBTAINS WATER FROM THE SOIL AND CARBON DIOXIDE FROM THE AIR 27
5．WHAT A PLANT DOES WITH THE SUGAR PRODUCED BY PHOTOSYNTHESIS 41
6．HOW PLANTS STORE FOOD 55
7．HOW PLANTS PRODUCE SEEDS 70
8．HOW FRUITS AND SEEDS ARE DISPERSED 86
9．SEED STRUCTURE AND GERMINATION 93
10．THE DEPENDENCE OF ANIMALS ON PLANTS FOR FOOD-DIGESTION 104
11．TRANSPORT IN PLANTS AND ANIMALS 121
12．RESPIRATORY ORGANS IN MAN AND OTHER ANIMALS 138
13．EXCRETION IN MAN AND OTHER MAMMALS-THE SKIN 149
14．SUPPORT AND MOVEMENT IN ANIMALS AND SUPPORT IN PLANTS 157
15．IRRITABILITY IN ANIMALS AND PLANTS 174
16．REPRODUCTION IN ANIMALS-DEVELOPMENT AND GROWTH 206
17．DIFFERENCES BETWEEN ANIMALS AND PLANTS-UNUSUAL TYPES OF NUTRITION 221
18．THE SOIL 241
19．VARIOUS TYPES OF PLANTS AND ANIMALS 255
20．EVOLUTION 287
INDEX 299