(1) 自然界的生態平衡是如何展現呢？人類的活動又如何破壞生態平衡？ (2) 人類和自然的關係應該如何平衡？ Human should not interfere with any of the relation between life and the earth. (F) Which factor enables sage to survive the long ages of natural selection in the dry West? Its small grey leaves can hold moisture. Grouse‚ Mule deer‚ Antelope depend on the sage Land management agencies decide to eliminate the sage to satisfy the demand of grazing land Immediate side effect of spraying on sagebrush‚ as illustrated in the example of Bridger
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fragmentation. Nearly every human activity can alter or destroy habitat. Farming replaces diverse natural communities with simplified ones of only a few plants species (certain crops). Grazing modifies the structure and species composition of grasslands. Either type of agriculture can lead to desertification. Clearing forests removes the food‚ shelter‚ and other resources that forest dwelling organisms need to survive. Farming‚ logging‚ and road building‚ and other type of human land use and development
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unemployed‚ peaking at nearly twenty-five percent in 1933. Soil erosion was a devastating result from the increase in farming activity in the Great Plains states. When coupled with a seven-year drought beginning in 1931‚ this erosion transformed grasslands which were once fertile into a desert-like region known as the Dust Bowl. Millions of Americans from the Great Plains states‚ such as Oklahoma‚ Texas‚ and Kansas‚ travelled to California‚ which‚ for numerous reasons‚ seemed like a promised land
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There were many immigrants that came to the beautiful landscapes of Wisconsin in the Late 1800’s and early 1900’s. With the improving transportation during this time encouraged large amounts of people to move West. Immigrants came by railroad‚ ship‚ or even horses with wagons. Milwaukee seemed to be where the majority of immigrants showed up to because of its accessibility and the many business opportunities in that area. The Germans were by far the most abundant while the Norwegians were second
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destroys the nature. These are only few of the activities that contribute to the devastation of nature. Overgrazing and groundwater pumping are some of the activities that damage the land. Overgrazing is one cause of soil erosion‚ in which it turns grassland into desert where soil is eroded and becomes harder for plants and trees to grow in that area which will affect the lives living there. Soil erosion is a natural process but it becomes a problem when human activity causes it to occur much faster
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Biology IB Study Guide 1: Communities and Ecosystems 5.1 Communities and Ecosystems (Core) 5. 1. 1 Define species‚ habitat‚ population‚ community‚ ecosystem‚ and ecology. Species – A species is a group of organisms with similar characteristics‚ which can interbreed and produce viable‚ fertile offspring. Habitat – A habitat is the environment in which a species normally lives or the location of a living organism. Population – A population is a group of organisms of the same species‚ who
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Biofuels: Mandating Harmful Consequences Energy is the common currency of all living things; something all species need. While plants rely directly on the sun for energy‚ humans rely on an array of sources like wind‚ fossil-fuel‚ water‚ solar‚ and more recently biofuels. Of these biofuels‚ which are fuels obtained directly from living plant matter‚ ethanol and biodiesel are the most commonly used. These two sources are typically used to fuel cars‚ trucks‚ aircraft‚ and small-engine machines. Biofuels
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Seemingly innocent‚ in the 1900s there began the worst manmade catastrophe to ever be recorded in history‚ the Dust Bowl. The Dust Bowl‚ also referred to as the “Dirty Thirties‚” was a time of extremely disastrous dust storms that significantly affected the agriculture of the U.S. Promised cheap land‚ farmers engulfed the Southern Plains and began to plow the land to grow wheat‚ not taking into consideration the climate and soil or ecology of the land; and there was the biggest mistake made in the
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Germination is the sprouting of a seedling to a seed. All seeds need oxygen‚ water‚ and efficient temperature in order to complete germination. A key ingredient for seeds to fully sprout is water. Water will moisten the seed and allow it to complete germination in order to grow and complete its cycle. Although‚ when sodium chloride is present‚ it takes way of water trying to enter the seed‚ therefore creating a blockage and will become inactive or germinate slowly (cocoponics‚ 2011). Unlike diffusion
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LABORATORY EXERCISE no. 1 Breed of Ducks I. OBJECTIVES: * To be able to know the different breed of cattle and their characteristics and importance. II. MATERIALS * Pencil * Ruler * Bond paper * Reference book * Ballpen III. GUIDE QUESTIONS: 1. What do you think is the most profitable way of raising cattle? Ans: I think maybe making money in cattle comes down to either extreme of pasture. Meaning‚ either you have a butt load of marginal land that you
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