Keith Foy McDowell Bio 101 04/09/2012 Amoeba The amoeba falls under the classification Euklaryota. It is part of the Protista kingdom which is made up of the simplest known eukaryotes. These organisms are single celled with a membrane surrounding the nucleus. The amoeba genus has over 290 million species. The amoeba cell is described as riged with extending pseudopods located at the anterior side of the cell. The pseudopods are used to move the cell around. It also has extensions
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All living things have evolved into three groups‚ or domains‚ of closely related organisms: Archaea‚ Bacteria‚ and Eukaryota. Archaea and Bacteria are small‚ simple cells surrounded by a membrane and a cell wall‚ with a circular strand of DNA containing their genes. They do not contain a nucleus or other internal structures that higher cells may have. These are called prokaryotes. Basically all the life you see today‚ including plants and animals‚ belongs to the third domain‚ Eukaryota. Eukaryotic
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rays from the sun. The sun’s rays made life outside of water nearly impossible. These changes made life on land possible and evolution occurred as prokaryotes gave rise to land living eukaryotes. The microfossil record indicates that the first eukaryotes evolved at least 1.5 billion years ago. Eukaryotes are distinguished from prokaryotes by their larger size‚ the separation of nucleus from cytoplasm by a nuclear envelope‚ the association of DNA with histone proteins and its organization
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which can be distinguished on the basis of their structure and the complexity of their organization. The simplest organisms which consist of one cell are called prokaryotes. More complex organisms are called eukaryotes and they consist of many cells. Objectives: * Define the terms: Eukaryotes & Prokaryotes with examples * Explain the differences between Eukaryotic cells and Prokaryotic cells with particular reference to the characteristics of their: (Nucleus/nucleoid‚ DNA‚ Mitotic division
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they must parasitize cells in order to translate their own genetic code and reproduce themselves. Cells are of two distinctly different types‚ prokaryotes and eukaryotes; thus‚ the living world is divided into two broad categories. The DNA of prokaryotes is a single molecule in direct contact with the cell cytoplasm‚ whereas the DNA of eukaryotes is much greater in amount and diversity and is contained within a nucleus separated from the cell cytoplasm by a membranous nuclear envelope. Many eukaryotic
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bacteria living lives”‚ the book explains about how through the process of “endosymbiosis” it was being taken into organelles and became a part of the development of where we are now. Without the mitochondria being engulfed by other single – celled eukaryotes‚ then life on earth wouldn’t be as evolved as it is now. From reading this book‚ it was in a way that if you don’t know too much about the mitochondria‚ you will be confused. After a few times of reading the same section of the book‚ you’re able
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person to discover the chloroplast. He discovered the chloroplast while working with lichens. Chloroplasts evolved from “swallowed up” prokaryotes(Unicellular organisms : bacteria) that once lived as independent organisms. At some point‚ a eukaryote (A eukaryote is any organism whose cells contain a
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Compare and contrast the Five kingdom and three domain classification system Classification is the method used by scientists to order living organisms. All species have a unique classification that results in a binomial name. classification is used to make it easier for different species to be identified by scientists. The current system‚ the Three Domain System ‚ groups organisms primarily based on differences in ribosomal RNA structure. Ribosomal RNA is a molecular building block for ribosomes
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List 2 different ways living organisms accomplish each of the 5 features above. (the focus here is to recognize how living things differ from one another) We divide Earth’s biodiversity into broad groups based on traits such as having a nucleus (eukaryotes)‚ not having a nucleus (prokaryotes)‚ or being unicellular or multicellular. 4. Be able to explain the difference between Producers and Consumers in paragraph form‚ and be able to provide an example of each. Producers are an autotrophic organism
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1. What are the major characteristics of each of the three domains of life? Why do some researchers believe that the Kingdom Protista should be split into more than one kingdom? In the early days of biology‚ all organisms were classified as either plants or animals. Single-celled eukaryotic organisms such as algae and Paramecium were assigned to one of the kingdoms according to whether they are photosynthetic or not. Fungi and prokaryotes were grouped with plants‚ because fungi are sedentary and
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