Life on Earth During the Precambrian Time Span

The Precambrian Time Span is the earliest time period on the Geologic Time Scale. It stretches from the formation of the earth 4.6 billion years ago to around 600 million years ago and encompasses many Eons and Eras leading up to the Cambrian Period in the current Eon. Beginning of Earth The earth was formed about 4.6 billion years ago in a violent explosion of energy and dust according to the rock record from Earth and other planets. For about a billion years, the earth was a barren place of volcanic action and a less than suitable atmosphere for most types of life. It wasnt until about 3.5 billion years ago that it is thought that the first signs of life formed. The Beginning of Life on Earth The exact way life began on Earth during the Precambrian Time is still debated in the scientific community. Some theories that have been posed over the years include the Panspermia Theory, Hydrothermal Vent Theory, and Primordial Soup. It is known, however, there was not much diversity in organism type or complexity during this extremely long period of Earths existence. Most of the life that existed during the Precambrian Time span were prokaryotic single-celled organisms. There is actually a pretty rich history of bacteria and related unicellular organisms within the fossil record. In fact, it is now thought that the first types of unicellular organisms were extremophiles in the Archaean domain. The oldest trace of these that have been found so far is around 3.5 billion years old. These earliest forms of life resembled cyanobacteria. They were photosynthetic blue-green algae that thrived in the extremely hot, carbon dioxide-rich atmosphere. These trace fossils were found on the Western Australia coast. Other, similar fossils have been found all over the world. Their ages span about two billion years. With so many photosynthetic organisms populating the earth, it was only a matter of time before the atmosphere started to accumulate higher levels of oxygen since oxygen gas is a waste product of photosynthesis. Once the atmosphere had more oxygen, many new species evolved that could use oxygen to create energy. More Complexity Appears The first traces of eukaryotic cells showed up about 2.1 billion years ago according to the fossil record. These seem to be single-celled eukaryotic organisms that lacked the complexity we see in most of todays eukaryotes. It took about another billion years before the more complex eukaryotes evolved, probably through endosymbiosis of prokaryotic organisms. The more complex eukaryotic organisms began living in colonies and creating stromatolites. From these colonial structures most likely came multicellular eukaryotic organisms. The first sexually reproducing organism evolved around 1.2 billion years ago. Evolution Speeds Up Towards the end of the Precambrian Time period, much more diversity evolved. The earth was undergoing somewhat rapid climate changes, going from completely frozen over to mild to tropical and back to freezing. The species that were able to adapt to these wild fluctuations in climate survived and flourished. The first protozoa appeared followed closely by worms. Soon after, arthropods, mollusks, and fungi showed up in the fossil record. The end of the Precambrian Time saw much more complex organisms like jellyfish, sponges, and organisms with shells come into existence. The end of the Precambrian Time period came at the beginning of the Cambrian Period of the Phanerozoic Eon and Paleozoic Era. This time of great biological diversity and rapid increase in organism complexity is known as the Cambrian Explosion. The end of the Precambrian Time marked the start of the more quickly progressing evolution of species over Geologic Time.

The Fallacies Of A Non Fiction Pieces - 1914 Words

When you read, hear, or see any kind of nonfiction, you have a choice on what to consider when interpreting the text. You can choose to look over the general idea of the piece or you can closely consider the claims made and their fallacies. The effect that close consideration has is that in some cases it discredits the author s argument by identifying the fallacies within the text. At the same time it can also help you prove your argument against someone s, or prove another person s argument to be valid. Only paying attention to the general idea of a nonfiction claim, specifically a claim of policy, will often lead to misinterpretation and blind acceptance. Many people could take these claims as a call to action that lead to dangerous exploits because of the fact that they are ignorant and let factless claims dictate their actions. Closely considering claims in a non-fiction pieces helps you see through the many different fallacies that could exist. It helps you to be more insightful when you do this because you come up with your own thoughts and ideas instead of blindly accepting someone else. Discrediting arguments is one part of close consideration. You can also use it to help prove your own argument or someone else s. In a debate or in court, or just in everyday life you will need to know how to justify yourself. Knowing how to discredit someone else s argument is beneficial because when you know what fallacies people can make, it shows you what what flaws in yourShow MoreRelatedAnalysis Of The Poem Ozymandias By Percy Bysshe Shelley1371 Words   |  6 Pagesdeeper when analysing a piece of literature in order to discover meanings which are not as obvious at a first glance. Week Two The topic of this week was writing skills. One quote especially stood out to me from the class PowerPoint from Enrique Jardiel Poncela, â€Å"When writing can be read without effort, great effort has gone into its writing.† (Class Presentation). 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Excel Hygiene Free Essays

Excel Hygiene is a new start-up enterprise, specialized in the management and disposal of bio-medical waste. The company has been established by a team of biotechnologists with core technical competence in the degradation of organic material using microbes especially naturally occurring bacteria. All health care facilities and institutions need to manage their medical wastes, which include body parts, metallic and plastic disposable parts and aids, as well as waste of both organic and inorganic origins. We will write a custom essay sample on Excel Hygiene or any similar topic only for you Order Now Large hospitals have incineration and compacting facilities of their own, but clinics and small nursing homes lack economies of scale to operate their own waste management facilities. Though bio-medical waste management and disposal is the intended core of the enterprise, medical institutions expect comprehensive hygiene services comprising removal of pathogenic loads, rodent, crawler, and vector control as well. The new company will therefore have to provide these ancillary services as well. Personnel training and efficient logistics are the keys to success in this business. Hospitals and clinics will have no hesitation in terminating contracts if waste if not removed in time, or if their infections rates soar. Waste must be compacted and incinerated only in designated areas, and must be collated at these sites before degradation is advanced. Therefore the new company has decided to limit its operations to an area of about one thousand square kilometers. The present market for hygiene services in this area has been estimated to be just about $50 million, but a three fold increase is expected in the next 5 years, as environmental consciousness spreads. Biotechnology is a relatively new field and the number of players is limited in this segment. The business offers superior growth and profit potentials for new start up companies . This kind of enterprise has high social values as well. How to cite Excel Hygiene, Papers

Ethical Business Management CSU

Question: Discuss the ethical business management in CSU global career service? Answer: CSU global career service actually serves the students to find their jobs in their favorable area. According to the coordinator, it is never too early to start thinking about the career. There are some steps to find and get jobs through CSU global career service. Those steps are written here bellow: Information about the field of job: The employees generally provide the tricks and tips about the creation of resume, how to find and get job in respective field, how to be successful in the job, internships etc. (Corfield, 2010) Resume interview: Optimal resume tool provides access to any students for creating the resume, portfolio as well as cover letters etc. Now, online supports are also available for creating resumes. Meeting with a coach in the comfortable field of career: The client students are allowed and facilitated to meet with coaches of career in their respective field of interest (Cosentino, 2010). They are allowed to meet up to three times with the coaches about any topics related to their career in respective fields of interest. Those topics are increase networking, strategy for searching job etc. Getting reference letter from the member of a faculty: To get any reference letter from any faculty member, one has to send a request letter first. A resume maker helps to sharpen the interview skills. After the virtual program of interview, one can get more confidence about giving interview. A practicing in interview helps anyone to achieve better skills (Gardner, 2011). Interview preparation Here some interview question samples are given for understanding of the interview. (Krarti, 2011) Questions regarding resume; Questions regarding working styles; Questions regarding the individuals skill; Questions regarding goal of the career; Questions regarding accomplishment; Questions regarding education; Questions regarding the company; Questions regarding the industry; Questions regarding salary and benefits; Questions regarding the strength and weaknesses and much more. (Corfield, 2010) Resume builder A good resume format is very important in getting a job properly. A good resume covers the educational attainments in details. Then the experiences should be shown. The goals, that means an individual wants to stay in the same field or innovate. Then the current job is a reason of pride etc. (Salvador, 2011) The result of the job search: Searching jobs in the interested field offers many jobs. Those jobs are in the field of interest of an individual. After finding the jobs, one can apply in those jobs. Then if the criteria are fulfilled, then the student will be eligible for an interview. After conducting interview, the eligible candidates get jobs (Salvador, 2011). Therefore, without changing the goals and fields, an individual can get jobs. That will be very helpful for anyones career. In the same method, an individual can have better job offers and thus will be able to lift up the career. Learning from the building if resumes: The format of a best resume for any job seeker is a very important thing. Resume is the one, on which the jobs are offered. It reveals the entire career history as well as the field of interest and the goals of any individual. One can capture quickly any employers eye by giving the best format of resume (Krarti, 2011). The best format of a resume is build depending on the work history of the individual, job objectives etc. a best resume format may ne of three types, such as functional, chronological and combination. When ones resume is presented in the front off any recruiter or interviewer or a hiring manager, it takes a few seconds to decide about that individual is in or out. So, for being the top candidate for a job post, one needs to right and perfect resume format. Assessment of experience: An experience is discussed here in this section. I applied for a job through Indeed and they called me for interview (Salvador, 2011). I went for the interview and faced several questions in the interview. I used to practice through the CSU global and had some knowledge about the types of questions can be faced in an interview. The recruiter asked me some questions about myself, about my past education, about my other job experiences, about my weaknesses as well as my strength areas, about whether I can do work in team or I like to work individually. Lastly, they asked about the salary and benefits. A discussion of what you would include on a resume for a job outside the United States: If anyone wants to change the career or wants to do jobs outside the United States, then some more things should be included in resume, such as experience in abroad or about the desired educational qualifications etc. (Krarti, 2011) Reference lists Corfield, R. (2010). Knockout job interview presentations. London: Kogan Page. Cosentino, M. (2010). Case in point. Needham, MA: Burgee Press. Gardner, D. (2011). Re sume  success. [Pickering, Ont.?]: Great Success Club Pub. Krarti, M. (2011). Energy audit of building systems. Boca Raton: CRC Press. Salvador, E. (2011). Step-by-step resumes. Indianapolis, Ind.: JIST Works.