An Introduction To BiologyPDF电子书下载

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