Extremophiles: life in an extreme environment essay sample extremophiles are organisms, mostly unicellular, which are able to tolerate and thrive in or utilize resources in extreme conditions biotic or living forms on earth fall under three domains: archaea, bacteria and eukarya. There exist many types of gram negative bacteria examples include cyanobacteria, spirochaetes, proteobacteria, green-sulfur and green non-sulfur bacteria the most common type is the proteobacteria that includes e-coli, salmonella, pseudomonas, legionella and helicobacter (jordan 2000, p 470.
They include the cyanobacteria, green sulfur bacteria, purple sulfur bacteria, and purple nonsulfur bacteria the sulfur bacteria are particularly interesting, since they use hydrogen sulfide as hydrogen donor, instead of water like most other photosynthetic organisms, including cyanobacteria. For example without bacteria to decompose rotten objects, our co2 would have been depleted and all our plants would have ceased to exist the process of decomposition releases nutrients back into the environment for plants and other living organisms.
The purpose of this experiment was to perform a variety of tests to identify the bacteria contained in the unknown sample labeled number 15 the following are the tests that were used to identify the two different bacteria. The purple non-sulfur bacteria can also take up low molecular weight organic compounds such as acetate in the dark, they prefer microaerobic conditions and perform aerobic respiration (fig 11) purple non-sulfur bacteria are common in surface sediments. Bacteria & history and ecology a+ pages: 4 words: 926 this is just a sample to get a unique essay hire writer nitrogen, and sulfur for example without bacteria to decompose rotten objects, our co2 would have been depleted and all our plants would have ceased to exist the process of decomposition releases nutrients back into the. Sulfur-reducing bacteria in anaerobic soils reduce sulfates to sulfides: 4 h 2 + so 4 2 − → h 2 s + 2 h 2 o + 2 oh − as shown in figure 3b , sulfur can be released to the atmosphere as methyl and dimethyl sulfide, organic sulfur compounds, and hydrogen sulfide.
In another interesting example, stable co-cultures of the green sulfur bacterium chlorobium limicola fthiosulfatophilum (dsm 249) could be maintained in chemostat with the purple sulfur bacterium chromatium vinosumchlorobium has the highest sulfide affinity. Chromatiacaea, commonly referred to as purple sulfur bacteria, are non-spore-forming bacteria that -- like green sulfur bacteria -- thrive in anaerobic aquatic environments however, unlike the green sulfur bacteria that have only one color variation, purple sulfur bacteria can also appear red, brown and even orange. Bacteria put the tang in yogurt and the sour in sourdough bread bacteria help to break down dead organic matter bacteria make up the base of the food web in many environments.
Extremophiles: life in an extreme environment essay sample extremophiles: life in an extreme environment essay sample extremophiles are organisms, mostly unicellular, which are able to tolerate and thrive in or utilize resources in extreme conditions and heterotroph with purple non-sulfur bacteria as sole example the chemical. Bacteria is a group of microscopic, single-celled microorganisms that inhabit virtually all environments, including water, soil, organic matters, and the bodies of plants and animals bacteria are distinguished in part by their genetic and morphological features for instance, they may have spiral, spherical or rod like shapes.
A trypticase soy agar (tsa) spread plate was provided to isolate the two bacteria contained within the sample after incubating the spread plate and identifying the two different types of colonies within the plate, a differential test was done with the isolated colonies by smearing each bacterium on its own slide and performing the methods given in the manual (table 1. A archaebacteria b eubacteria what are the two kingdoms of bacteria a their cell walls have different structures b their lipids in their plasma membranes are different c their trna and rrna bases are different name 3 differences between archaebacteria and eubacteria we will write a custom essay sample on bacteria or any similar topic [. Chemosynthetic bacteria obtain energy by oxidizing inorganic substances, such as compounds of iron or sulfur, nitrites, and ammonia the energy is used for the synthesis of organic compounds the nitrifying bacteria in the nitrogen cycle oxidize ammonia or nitrites to nitrates, which can be used by plants as a source of nitrogen.