MICROBIOLOGY STUDY QUESTI0NS - EXAM 1 1. Briefly discuss the theory of spontaneous generation. What scientific evidence was presented to disprove the theory? Spontaneous generation- theory (until second half of 19th century) that some forms of life can arise spontaneously from nonliving matter‚ i.e. maggots from corpses Redi (1668)- demonstrated maggots do not arise from decaying meat by filling two jars with decaying meat (one sealed‚ one unsealed). Unsealed jar developed larvae and sealed did
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INTRODUCTION The Philippines is looming with garbage problems despite the passage of the Ecological Solid Waste Management Act or the Republic Act (RA) 9003. In 2007‚ the first quarter data from the National Solid Waste Management Commission shows that there are 677 open dumpsites‚ 343 controlled dumps‚ and 21 landfills in the country. An additional 307 dump sites are subject for closure or rehabilitation plans but without definite schedules for enforcement. About 215 additional landfills are
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Solid waste disposal is one of those rare endeavors where success breeds anonymity. To the credit of local waste management agencies and contractors‚ their service is highly inconspicuous in northeastern Illinois. This low profile belies the importance and complexity of efficient trash collection‚ and veils many impacts of municipal solid waste (MSW) policy from our everyday lives. Like other environmental elements‚ waste does not follow regional borders. From an email survey that we conducted
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1. (a) I‚ III‚ and IV are correct. II is not correct. To explain III‚ de Broglie’s equation states l = h/(mv)‚ so nl = nh/(mv) = 2pi(r). Where: l = wavelength‚ v = velocity of electron‚ n = some positive integer‚ r = distance of electron from center‚ m = mass of electron. Solve‚ get mvr = L = nh/2pi. (b) The current wave mechanical model for the atom states that there are an integer number of wavelengths in every standing integer number (n). 2. (a) The first shell electrons in Lithium are
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Conventional Oil Based Plastics Vs. Innovative Green Plastics The Twentieth century was filled with many inventions that have greatly influenced our world. The invention of plastic was one of the most dramatic of them all. Humans use plastics each and every day and just imagining a day without them is inconceivable. A material can be a plastic if it satisfies three conditions: its main ingredient must be a polymer material‚ it must be fluid at some point during processing‚ and it must be solid
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Essay plan: Definition of rubbish Meaning of value Consumer society Thompson theory Stevengraph paintings Recycling Conclusion Rubbish is something that has no value or been disvalued (Making Social Lives p.105). Rubbish is something that nobody want or need. It appears simple but the term value is in fact quite a complex term. Value means how useful something is. An item has a value because it is valued by people who use them. If an item is regarded to as rubbish it is mainly because
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1. Climate Change and the Philippines Recent scientific studies reveal that human activities have contributed significantly to the increase of greenhouse gases in the atmosphere that causes climate change. The Philippines is a hotspot for climate change disasters particularly the risk for agriculture and food security due to extreme El Nino and severe tropical cyclones. The spread of infectious diseases are influenced by fluctuations in climate variables‚ temperature‚ relative humidity and
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When people think of Nazi Germany‚ most will convey an image of Hitler‚ the Concentration Camps‚ and the Jewish persecution. But‚ it is much deeper than just this. What it almost never brought up is how the Nazis accomplished what they did. They were able to not only control an entire society but blind them from one of the world’s largest genocides to date. Because of the economic state that Germany was in‚ and the constant brainwashing by propaganda‚ the Nazi Party was able to thrive. In order
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RECYCLING Recycling is a process to change materials (waste) into new products to prevent waste of potentially useful materials‚ reduce the consumption of fresh raw materials‚ reduce energy usage‚ reduce air pollution (from incineration) and water pollution (from landfilling) by reducing the need for "conventional" waste disposal‚ and lower greenhouse gas emissions as compared to plastic production.[1][2] Recycling is a key component of modern waste reduction and is the third component of the "Reduce
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Estimated Number of Animal and Plant Species on Earth Believe it or not‚ there are about 950‚000 species of insects No one knows for sure how many species of animals exist on Earth. In fact‚ some 10‚000 species of animals are discovered each year‚ with over one and a half million species already described. Projections for the total number of species on Earth range from 2 million to 50 million. Animal group Number of species Vertebrates Amphibians 6‚199 Birds 9‚956 Fish 30‚000 Mammals
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