The Discovery of DNA

Question 1.Discuss how the unique physical and chemical properties of water contribute to the importance of water for life on Earth to survive. 2.Discuss how the methods of experimentation and observation have changed throughout the history of science. 3.Explain the role so called “accidental” discoveries played in the history of science. 4.Describe the major experiments and scientists involved in the discovery of DNA as our hereditary material and its structure. 5.Explain what role women played in the Scientific Revolution of the 18th Century? What role do women in science play today?This assignment will be worth 20% of your grade.  Your paper should be creative and interesting, and should be a minimum 1500 to 2000 words in length. It should be well-organized and demonstrate an orderly flow of information that clearly addresses the subject chosen. Answer The Discovery of DNA The discovery of DNA as the hereditary material and its structure marked a major milestone in the understanding of genetics and transfer of hereditary information. In the mid twentieth...
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The Success of Insects

Question Topic : The Earth’s largest phylum is Arthropoda, including centipedes, millipedes, crustaceans, and insects. The insects have shown to be a particularly successful class within the phylum. What biological characteristics have contributed to the success of insects? In many science fiction scenarios, post Answer The Success of Insects Insects are some of the most successful organisms on the planet. There are a number of factors which have contributed to insects’ success on earth. Of the factors is because insects are adapted to live in different types of habitats. Insects are widely distributed on earth (Beerling, 2007). They are able to live across different ecosystems such as deserts, hot springs, tropical rain forests, arctic habitats and among others. Insects have a high reproductive capacity. Most insects are able to give a large number of offspring within a short period. This increases their numbers. Their relatively small size also contributes to their success. The small size means that they require less energy and also the...
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Organisms in the Domains Bacteria and Archaea

Question Discuss the similarities and differences between organisms in the domains Bacteria and Archaea Answer Organisms in the Domains Bacteria and Archaea Archaea were formerly classified as bacteria with the name archaebacteria due to a number of similarities between them and bacteria. It is only after careful studies that scientists discovered the distinct biochemistry and evolutionary history between them (Pommerville, 2014). There are a number of similarities between archaea and bacteria. To start with, archaea and bacteria have basically the same size, shape and appearance. Secondly, both of the organisms multiply through binary fission which is a form of asexual reproduction. Thirdly, the primary means by which both organisms move is through the use of flagella. Fourthly, both are classified as prokaryotes since they lack a complex cell structure common among eukaryotes. Lastly, they both contain semi-permeable cell membranes that allow selective movement of elements or substances through them (Pommerville, 2014). There are a number of differences found between archaea and bacteria that sets them...
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Genetic Drift

Genetic Drift   Genetic drift is the change or fluctuations that occur in gene variants in a particular population (Jacquez, 2015). Genetic drift occurs when variant genes known as alleles change in number, either decreasing or increasing over time by chance. Genetic drift occurs in two types: the bottle neck effect and the founder effect. The bottle neck effect is observed when a large percentage of a particular population is decimated mostly through a natural disaster such as floods or fire. The natural disaster only leaves a few of the species to reproduce. The population left is not representative of the previous genetic makeup of the original population. A bottle neck effect can be seen when natural disasters decimate a large part of the population (Jacquez, 2015). For example, a fire outbreak in a forest may kill over 95 percent of beetles and leave the rest which begin to reproduce. The 5 percent of the beetles left could be having a different genetic...
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DNA and RNA

DNA and RNA DNA and RNA are similar in a number of ways. Both of them are made up of pyrimidine and purine nitrogenous bases, a single radical of benzoic acid and a pentose molecule (Richards & Hawley, 2010). In both the DNA and RNA, the bases are connected in series in a backbone that holds them in place. During base pairing, both follows the same rules with the exemption being that RNA pairs the bases A and U. DNA and RNA are also different in some ways. DNA pairs the bases A with T, while RNA pairs A and U. Another visible difference is that RNA contains temporary information while DNA is a permanent record of genetic information. RNA is used to carry information to ribosome and eventually becomes degraded after it fulfills its function in the cells. Both have structural differences in that DNA mostly occurs as double stranded while the RNA contains single strands (Richards & Hawley, 2010). Humans...
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Organisms and A POST -ANTIBIOTIC ERA  -Short answers          

Question PART I: SHORT ANSWER Directions: Please answer each of the following questions.  Please ensure that your responses are at least 3 to 5 sentences in length. Provide two kinds of evidence that support the idea that life could have originated on earth. Why must the first organism of earth have been anaerobic? List two distinguishing characteristics of each of the following domains: Bacteria, Archaea, and Eukarya. Describe four kinds of evidence scientists use to place organisms into a logical phylogeny. List the four kingdoms of the domain Eukarya, and give two distinguishing characteristics for each. Describe how viruses reproduce. What is a thermophile? A halophile? Name two beneficial results of fungal growth activity. List two ways that scientific names are different from common names for organisms. What taxonomic groups are included in the category known as microorganisms? PART II: ESSAY Directions: Write a 1 to 2 page, double-spaced paper in 12 pt. font in response to the following question.  Find one article using...
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Short Answer Biology Questions

Question Directions: Please answer each of the following questions.  Please ensure that your responses are at least 3 to 5 sentences in length. Why can there be greater genetic diversity within a gene pool than in an individual organism? List four processes that can lead to local, genetically distinct populations. How is a clone developed?  What are its benefits and drawbacks? What is the role of a genetic counselor? What were eugenics laws?  List two facts about human genetics that the advocates of eugenics failed to consider. List five assumptions about the nature of living things that support the concept of evolution by natural selection. Why is sexual reproduction important to the process of natural selection? How might a harmful allele remain in a gene pool for generations without being eliminated by natural selection? Distinguish among stabilizing, directional, and disruptive selection. Why is genetic drift more likely in small populations?  Give an example of genetic drift. Answer Short Answer Biology Questions Why can...
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Environmental Resources Worksheet

Environmental Resources Worksheet

Environmental Resources Worksheet Minerals Metallic minerals are those which give new products on melting, for example iron and manganese while non-metallic minerals such as coal and salt do not give new products on melting. Iron is extracted from ores and used in the construction industry and making of tools. Manganese is used in making steel. Coal is used as a source of energy while salt is used to season and preserve food. Mining Minerals may be extracted through open pit mining or through shaft mine for minerals that occur on the earth’s surface and those that are found under the earth’s surface respectively. After extraction, crude ores are crushed in order to separate waste rock and valuable components. The crushed mixture is concentrated to separate minerals from other waste substances. Minerals can be mined through surface mining, underground mining and in-situ leaching. Surface mining techniques such as open-pit mining involves removal of vegetation and other materials that lie above mineral deposits.  Underground mining techniques such...
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Balancing Ecosystems

Balancing Ecosystems

Balancing Ecosystems This letter highlights the dangers associated with invasive species to Sparksville's and Glimmerville’s aquatic ecosystem balance. An ecosystem balance is defined as a state of equilibrium that exists in a certain community of living things in which the species, genetics and the ecosystem diversity remain unchanged over time (Marcia, 2011). From Episode 1, a number of reduction factors and growth factors which impacted the ecosystem are evident. The reduction factors are mainly climate change and natural calamities. Climate change has put a threat to the survival of many species around the world. Notable natural calamities include floods and volcanic eruptions. Growth factors identified in the Episode include sunlight, soil nutrients, precipitation, and soil configuration. Invasive species may negatively affect the ecosystem in a variety of ways. Since they reproduce rapidly, invasive species have in some areas replaced or reduced the native species to worrying levels. Secondly, invasive species can change the ecosystem processes such as predator-prey dynamics. In case native...
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