植物是如何登陆的 -王怿（How did the plants land - Wang Yi）.docVIP

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植物是如何登陆的 -王怿（How did the plants land - Wang Yi）.doc

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植物是如何登陆的 -王怿（How did the plants land - Wang Yi）

植物是如何登陆的 -王怿（How did the plants land - Wang Yi） How did the plants land? - Wang Yi Brief introduction of the speaker Wang Yi, research fellow, Nanjing Institute of Geology and Palaeontology, Chinese Academy of sciences. He graduated from the Department of geology of Nanjing University and later graduated from Nanjing Institute of paleontology. He has been engaged in the study of the evolution and development of ancient plants. content validity What Im talking about today is how plants landed. They can be seen very clearly from the present vegetation. That is to say, there are many kinds of organisms in the ocean at present, and there are many types, but there are many types of plants on the land now. Then the plant occupied different ecological regions, some in the mountains, some in the river, the plant is very prosperous, but in the history of earth, this plant is how to occupy the land is very important, why is it important? This is mainly to consider that only after the plant has landed, it has survived the land and occupied the vast space of the land, so that it can provide some conditions for the landing of the animals. How can plants develop from aquatic algae to different ecosystems that eventually occupy the entire land and form a forest?. We look back at the evolutionary history of the earth, which has been developing today for 4 billion 500 million to 4 billion 600 million years. In about six hundred million years ago, life on earth is mainly by marine organisms, a large number of algae living in the water, plants live on land, it must have three basic conditions: first, with vascular tissue, so plants can erect, live on the earth. Two, to prevent and regulate water evaporation and photosynthesis conditions. Three, the ability to reproduce. With these three conditions, the landing of plants will have a foundation. The plant gradually leaves the water and lands. That is to say the process of landing is a plant from aquatic; such a terrestrial environment t