第一篇：Biodiversity is the variety and variability of life on E This includes all of the plants and animals that live and grow on the Earth， all of the habitats that they call home， and all of the natural processes of which they are a The earth supports an incredible array of biodiversity—from Thailand’s tiny bumblebee bat to the ocean’s great blue whale—with plants and animals of all shapes and sizes in This fantastic variety of life is found in diverse habitats ranging from the hottest desert to tropical rainforests to the arctic Biodiversity is essential to every aspect of the way that humans live around the Plants and animals provide people with food and medicine， trees play an important role in absorbing greenhouse gases and cleaning the air we breathe， and rivers and watersheds provide the clean water that we Unfortunately， the earth’s biodiversity is disappearing， with an estimated 1，000 species per year becoming Conserving biodiversity is especially crucial in developing countries where people’s livelihoods are directly dependent on natural resources such as forests， fisheries and 第二篇：Plants and animals provide people with food and Forty percent of all prescriptions written today are composed from the natural compounds found in different An estimated 80，000 edible plants are found in the world， and one in every three mouthfuls of the food you swallow is prepared from plants pollinated by wild insects and The extinction of each additional species results in the irreversible loss of unique genetic materials， each of which has potential for development of medicines and foods and associated enterprises that create While plants and animals keep you well fed and healthy， trees play an important role in absorbing greenhouse Through photosynthesis， trees absorb and store atmospheric carbon， helping to combat global warming and purifying the air we Forests also control soil erosion and purify As natural systems breakdown， people around the world are forced to find alternative and often more costly ways to maintain adequate supplies of clean water or to deal with increasingly polluted The net economic benefits of biodiversity are estimated to be at least $3 trillion per year， or 11 percent of the annual world economic 希望有帮助
Abstract: the market demand for the buckeye， but because the buckeye conventional breeding way is seed propagation， reproductive slower， plus the buckeye rate is low and seeds， seedlings to inactivation rate is weak， so the unearthed， reproduction rate low， difficult to meet the market Therefore， from the flowering length， the effect of the climatic conditions and take the morphological structure， flowering length to the pollen of energy， energy， the seed vigor of pollen influence on some physiological indexes of determination to proven buckeye rate， low birth rate， low reason for improving the buckeye setting out the theoretical basis and reproduction rate， in order to improve the buckeye breeding take measures to meet the demand of the The growth of the buckeye flowering characteristics Keywords: buckeye， Growth flowering， Dynamic measurementAbstract: The market demand for larger Aesculus， Aesculus However， due to the way conventional breeding sow reproduction， slow reproduction， combined with the strong low Aesculus seed and easy to inactivation， the rate of seedlings less unearthed Therefore， a lower reproductive rate and are difficult to meet the market Therefore， the length of flowering period， the impact of climatic conditions， as well as the form of flower structure， flowering to the length of pollen viability， pollen viability of different conditions， the effects of seed vigor， such as the determination of some physiological indicators of Aesculus proven to lower seed-setting rate， the reasons for the low rate of reproduction， in order to improve the seed-setting rate Aesculus， reproduction rate to identify the theoretical basis， in order to improve the breeding Aesculus to take concrete measures to meet the needs of the 还有这个标题：Aesculus Growth Characteristics of Flowering and Fruiting 希望对你有用~~~~~~~~~~~~~~~~~
