1．The Science of Biology 1
2．Man and the Ecosystem 5
3．Types of Plants(Ⅰ) 8
4．Types of Plants(Ⅱ) 12
5．Development of Root Systems 15
6．Stems 18
7．Leaves 21
8．Photosynthesis—Ultimate Energy Source 25
9．The Walnut Tree and Allelopathy 28
10．The Blue-green Algae 32
11．The Conifers 37
12．Mushroom and the"Fairy Ring" 40
13．Ginkgo 43
14．Varieties among Flowers 49
15．Plants that Eat Insects 54
16．Viruses and Plant Diseases 59
17．The Discovery of Bacteria 64
18．Amoeba 69
19．Ciliates—Paramecium 74
20．A Simple Sponge—Scypha 80
21．Beetles 85
22．Means of Defense of Insects 90
23．Reptiles 95
24．Coyote—Gray Wolf 99
25．Migration of Birds 103
26．Black Bear 108
27．The Apes 113
28．SpermWhale 119
29．Symbiosis of the Crab and the Anemone 123
30．Classification of Animals 128
31．Characteristics of Living Matter 135
32．The Difference between Animals and Plants 139
33．Two Kingdoms or Five? 143
34．Aging 147
35．The Darwin-Wallace Theory of Natural Selection 151
36．Evolution,Genetics and the Environment 156
37．The Work of Mendel 160
38．Where Are the Genes? 165
39．The Biological Clock 170
40．Water Pollution by Sewage 174
附：参考译文 179