experiment’s ultimate goal is to find the water potential of the potato cell. This was achieved through placing potato cores in different concentrations of sucrose (0.2%‚ 0.4%‚ 0.6%‚ 0.8%‚ 1.0%‚ 2.0%‚ 3.0% and 4.0%) solution and to observe how much water was gained or lost through osmosis to reach a prediction of the concentration within the potato cell. The results displayed that the concentration of sucrose within the potato cell is 1.7% and that as the amount of sucrose is increased in the external
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Stem Cell Controversy Stem cells were first isolated and cultured in November of 1998 and have been surrounded with much debate and controversy since day one. “Although the ethical debates have been mostly static and have closely mimicked the ethical debates over abortion‚ the political determinations concerning federal funding of stem cell research have gone through numerous evolutions in the years since the first hESCs were isolated and cultured” (Saltzberg 505). Research is currently being
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Sickle cell anemia is a blood disorder that affects the 11th chromosome which is a hemoglobin gene. Hemoglobin is a protein located in red blood cells (RBCs) that carries oxygen through the body. This disorder is inherited from two parents with abnormal genes that are heterozygous (Rr). This means that both parents who have the trait may pass on the disorder to their offspring. The phenotype makeup is recessive. Those who inherit a normal copy of the chromosome 11 and a mutated chromosome will carry
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renewable energy sources‚ fuel cell technology has received great attention as an alternative to the conventional way of getting energy due to its high efficiency‚ clean operation and cost efficient supply of power demanded by the consumers. Proton exchange membrane (PEM) fuel cells technology plays a leading role for many applications when comparing with other competitive types of fuel cells. The world is in high demand for clean alternative fuel source and PEM fuel cells could be that change with a
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Cell Phone Etiquette Everyone has had that experience‚ at the movies‚ out to dinner or even at a meeting and all of a sudden that new hot song starts playing and you realize that it is a ring tone. If it is only once then do not worry about it‚ but‚ if it seems to happen all the time it is a problem. There is a time and a place for the use of cell phones and then there are times when they should not be used. Dinner at a restaurant is neither the time nor place to be receiving phone call. When
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Should cell phones be allowed in school? Yes. They should be allowed in school. Used in class‚ yes. They must have it on vibrator thought and can’t answer it while a teacher is talking. And you can’t disturb you class. In other words‚ someone in "Twee tribune" believes that cell phones should be allowed in school but a good handle full of students believes that cell phones should not. Cell phones are an electronic device that is used to make mobile telephone calls across a wide geographic area
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non-membranous organelle ⁃ cell wall: peptidoglycan ⁃ binary fission ⁃ bacteria simple‚ dynamic‚ well adapted for survival and new environment ⁃ archaea pseudopeptidoglycan‚ extreme environment ⁃ eukaryotic ⁃ nucleus ⁃ multiple chromosomes ⁃ membranous and non-membranous organelle ⁃ no peptidoglycan ⁃ mitosis ⁃ algae photosynthetic‚ pigment‚ cellulose ⁃ fungi natural decomposer‚ chitin cell wall‚ absorbs organic material ⁃ protozoa no rigid cell wall‚ free entities or parasites
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cytology may be defined as that branch of science‚ which deals with the morphology and physiology of the cell. Cytogenetics: Combined study of cytology and genetics. History Events (cytology and Genetics) |Year |Events | |1665 |R. Hooke – Introduced the term “cell” | |1830
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Abstract Sickle-cell disease is a genetic disorder that results from the abnormal structure of red blood cells. The peculiar shape of the red blood cell prevents the normal absorption of oxygen. This disease results from the abnormal production of hemoglobin S (HbS). Therefore‚ a mutation in this gene causes a lower supply of oxygen to the cells‚ which results in occlusion of the blood vessels. Individuals diagnosed with sickle-cell anemia have abnormal function of the gene that encodes for subunit
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Bio 1011 Cells Exam #1 Answer the multiple choice questions on the scantron sheet. Select the one choice that best answers the question. Answer the short answer questions in the space provided at the end of the exam. 1. Which of the following is the SMALLEST? a. a bacterium b. a ribosome c. a hexose sugar d. a water molecule e. a yeast cell 2. The four main families of small inorganic molecules in cells are a. salts‚ sugars‚ fatty acids‚ amino acids‚ nucleotides b.
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