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课件网) Unit 5 Revealing Nature 选择性必修第一册 Understanding ideas Lead in An evolutionary tree lower forms of life higher forms of life evolve--evolution What species do you recognise in the picture What factors can cause the process of evolution 1. What species do you recognise in the picture paramecium 草履虫 jellyfish 水母 flatworm 扁形动物 earthworm 蚯蚓 snail 蜗牛 crab 螃蟹 starfish 海星 fish frog tortoise 乌龟 bird zebra 斑马 human algae 藻类 moss 苔藓 fern 蕨类植物 gymnosperms 裸子植物 angiosperm 被子植物 [ p r misi m] [ ld i ] 2. What factors can cause the process of evolution The ever-changing environment; population immigration; genetic mutation (基因突变); natural selection; … Who is mentioned in this video？How much do you know about him Charles Darwin and his Theory of Evolution Charles Darwin (1809 –1882) was an English geologist and naturalist. In his famous book On the Origin of Species, Darwin proposed the theory that organisms (individual life forms) evolve extremely slowly. He stated that the organisms that were better suited to their environment would survive and pass on their favourable characteristics to the next generation, while the less suitable organisms would gradually die out. He called this process “natural selection”. Darwin's Theory of Evolution is one of the basic foundations of modern science. It shows that plants and animals can change over time. The changes are usually small and difficult to detect, but they add up over many generations and can result in new species. Para___ Para___ Para_____ _____ the journey After the journey During _____ the journey Before 1.The structure 6--7 2--5 1 2.Choose the best main idea. A. Darwin’s interest in various living things made him a great naturalist. B. Darwin’s journey on the Beagle inspired his Theory of Evolution. C. Darwin went on a journey to confirm his theory that humans had evolved over time. Fast reading Choose the main idea of the passage and give your reasons. 1 Darwin’s interest in various living things made him a great naturalist. 2 Darwin’s journey on the Beagle inspired his Theory of Evolution. 3 Darwin went on a journey to confirm his theory that humans had evolved over time. Today, On the Origin of Species is regarded as one of the most important works ever written. It has changed ideas about life on Earth forever. And it all began with the journey on the Beagle A Journey of Discovery Journey on the _____ Journey to discover _____ ship Beagle The Theory of Evolution pun 双关 What is your understanding of the title 1. What kind of person was Darwin in others’ eyes 2.What kind of person was Darwin according to para.1 In the captain's eyes In common people's eyes In his father's eyes He was not the captain's first choice He was a young man who had left medical school without completing his degree He was a disgrace to himself and all his family Before the journey (para.1) Careful reading Nu ... ...
