英语 第3册 生物类PDF电子书下载

Lesson 1 TYPES OF GREEN PLANTS 1

Reading Material：PLANTS 12

Lesson 2 POLLINATION 18

Reading Material：THE STORY OF A CATTAIL SEED 27

Lesson 3 BACTERIA 33

Reading Material：BUGS AND US 44

Lesson 4 BIOLOGICAL CONTROL 52

Reading Material：WHAT IS AN INSECT？ 63

Lesson 5 BEES-SOLITARY，PARASITIC AND SOCIAL 71

Reading Material：HIVE-BEES-THE MOST FAMOUS POLLINATORS 84

Lesson 6 ANIMAL BEHAVIOUR 91

Reading Material：HOW ANIMALS PROTECT THEMSELVES 104

Lesson 7 WHAT IS LIFE？ 112

Reading Material：THE LIVING AND THE LIFELESS 125

Lesson 8 PROTEINS 131

Reading Material：THE PROTEINS 143

Lesson 9 THE STRUCTURE AND FUNCTIONS OF LIVING THINGS 153

Reading Material：THE CELL THEORY 163

Lesson 10 ENZYME ACTION 169

Reading Material：ENZYMES 181

Lesson 11 THE VARIETY OF LIFE 188

Reading Material：DIVISION INTO SPECIES AND CLASSIFICATION 201

Lesson 12 FUNGI-FRIENDS AND FOES 208

Reading Material：THE STORY OF A MUSHROOM 221

Lesson 13 THE GROWTH OF PLANTS 226

Reading Material：THE CONTINUITY OF LIFE 237

Lesson 14 CHLOROPHYLL AND PHOTOSYNTHESIS 246

Reading Material：THE PROCESS OF PHOTOSYNTHESIS 257

Lesson 15 MENDEL AND THE BEGINNING OF GENETICS 263

Reading Material：VARIATION 277

Lesson 16 DNA-THE MOLECULE OF LIFE 283

Reading Material：DNA：THE HEREDITARY MATERIAL 293

Lesson 17 DARWIN‘S THEORY OF NATURAL SELECTION 298

Reading Material：ADAPTATION OF ANIMALS TO HEAT AND COLD 308

Lesson 18 RECYCLING IN NATURE 316

Reading Material：THE NITROGEN CYCLE 329

Lesson 19 THE FLOW OF ENERGY THROUGH THE FOOD CHAIN 337

Reading Material：ENERGY FLOW AND FOOD CHAINS 350

Lesson 20 THE DANGER OF CHEMICAL INSECTICIDES 357

Reading Material：WATER POLLUTION 369

Lesson 21 LIVING IN A DARK SEA OF SMOG 376

Reading Material：AIR POLLUTION，WEATHER AND CLIMATE 387

Lesson 22 THE SCIENCE THAT IMITATES NATURE S MECHANISMS 394

Reading Material：LIVING LIGHT 409

SUPPLEMENTARY READINGS： 419

1．THE FROG’S LIFE CYCLE 419

2．TYPES OF ANIMALS -THE VERTEBRATES 423

3．TYPES OF ANIMALS-THE INVERTEBRATES 427

4．TOO MUCH KILLING 431

5．INSECT IN ARMOUR-BEETLES 435

6．CIRCULATORY SYSTEM 441

7．A JEWEL FISH FACES AN UNUSUAL PROBLEM 445

8．HUNTING THE OCTOPUS IN THE GILBERT ISLANDS 449

9．FIGHTING FISH 453

10．HOW DO PROBLEMS ORIGINATE FOR YOUR EXPERIMENT？ 456

11．CHEMICALS IN CROP PRODUCTION 460

12．FOOD FROM THE SEA 466

VOCABULARY 472