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Creature Chemistry' Subscribe




Few Biology questions;Attachment Preview;Bio103Asmt.docx Download Attachment;Topic 2: Creature Chemistry;Actions for 'Topic 2: Creature Chemistry;Subscribe;Hide Description;Before preparing your response to this week's discussion topic I recommend (not required) that you watch;this video, a crash course in biological molecules, in addition to working through this week's OLI modules;Pick and research a topic related to chemistry and your chosen creature from last week. You could;describe the chemical compounds responsible for hair or feather colors, that helps it survive in various;environmental conditions like extreme cold or heat, that makes it poisounous, glow in the dark, or the;chemical composition of its diet. Before you start your research state a hypothesis. Then summarize what;you learned from your research and in the conclusion state whether the research support your;hypothesis, or not.;As long as the topic is related to chemistry and your creature you have a free range of topics to explore;here. You need to explore the topic in depth and relate it to the OLI content. Your response should be 2-3;paragraphs.;One main response is due Sunday August 31, two replies are due Tuesday September 2.;Example;Hypothesis: The eggs shells of the Great Blue Heron are made of a calcium compound that make it hard, this is important for;protection of the embryo.;Research Summary: I learned that bird eggs are made primaryly of calcium carbonate, which consist of calcium ions and;carbonate ions, the latter consisting of one carbon atom and three oxygen atoms. The calcium and carbonate ions are connected;by ionic bonds, the negatively charged carbonate ions donating two electrons to the positively charged calcium ions:.;Image copied from:;The calcium carbonate in the ggg shells does make them hard, and this protects the bird embryos, but I also learned that they have;lots of tiny pores that allow transport of various compounds, such as gasses and water, in and out of the eggs. So in other words;eggs are surrounded by semi-permeable membranes just like other cells (we will get back to this next week).;If you are interested in learning more about the anatomy and chemistry of eggs, check out this;article:;My hypothesis was supported by the research even though the function of the egg shell is more complex than I had originally;proposed.;Emperor Penguin. My last week creature Pick.;1.;The species that I chose is the Emperor penguins. I chose this wonderful creatures because of how;beautiful they look. Apart from Barn Owl they are my second favorite birds. I like how they huddle;together to escape wind and keep warm. The female penguins care so much for their chicks that when;they go outside they bring food home, while the male emperors go to the sea to fetch food just for;themselves. I guess that doesnt apply to every male species. They live in Anterctic ice, and like to be in;water. I saw this kind of penguins in Europe and in Africa..Emperor penguins picture from;Topic 3..;Actions for Topic 3: Creature Cells;1) What type of cell does your species have?;2) Does it have special cells to detect its environment or cells that help it live in its environment? Does it;have specialized cells that are important for cellular respiration or photosynthesis or important for another;type of cellular process, like reproduction?;If you are unable to find information about cells in your specific species you can describe cells that are;characteristic for the group of species your creature belong to (fish, birds, mammals, flowering plants;fungi etc). Use both the OLI course materials and additional resources to prepare your response.;Since the Great Blue Heron is a bird I can conclude that it has eukaryotic cells, and since it is an animal I can conclude that its cells;do not have a cell wall, but they do have a cell membrane, mitochondria and a nucleus in addition to other organelles (OLI).;When i did a web-search for "Great Blue Heron cells" I came across an article titled Intracellular Yeasts in Endothelial Cells of a;Great Blue Heron (Ardea Herodias) In this research study scientists from Canada found that the endothelial cells of a dead;Great Blue Heron contained yeast cells. This study was conducted in an attempt to understand the cause of disease in domestic;birds. Endothelial cells are cells that line the inside of blood vessels. They form a barrier between the blood and the the rest of the;circulatory system and allow for efficient blood flow.;This is an example of the many single-celled organisms that larger organisms contain. Yeast are single-celled fungi, which means;they are eukaryotic cells. On a side note, have you heard that we humans have more bacterial cells than human cells? Check out;this article to learn more: Humans Have Ten Times More Bacteria Than Human Cells: How Do Microbial Communities Affect;Human Health?;Topic 4;Actions for Topic 4: Creature Growth and Reproduction;In your main response answer at least two of these questions as it related to your favorite creature;1) How many chromosomes are found in each cell of your organism? Does this number vary between;different cells? Explain.;2) Explain your species' reproductive strategy. Sexual and/or asexual? Is mitosis and/or meiosis involved?;Other processes?;3) Can your species regenerate body parts or is healing limited? Does growth and healing involve mitosis;and/or meiosis?;4) Which stages does your species grow through as it develops into adulthood?;5) What happens if mitosis is out of control? Are there any known diseases associated with mitosis errors;in your species?;Example;1. I was not able to find the chromosome number for the great blue heron, but I did find that chickens and doves have 78, and that;turkey and pigeons have 80. Since all birds are related I hypothesize that the Great Blue Herons chromosome number is in the;same range, which is a significantly higher number than humans. This is the number of chromosomes in somatic cells. Egg and;sperm cells would have half that number chromosomes.;;2. The Great Blue Heron reproduces sexually, the male producing sperm cells through the process of meiosis, and the female;producing egg cells through the process of meiosis. Meiosis is the production of four haploid cells through a series of phases;grouped into meiosis I and meiosis II. Each of the haploid cells that result from meiosis are genetically unique. (OLI)


Paper#15354 | Written in 18-Jul-2015

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