live in a world full of bacteria‚ in fact‚ bacteria is all around us. They are tiny‚ one celled creatures that get nutrients from their environments in order to live. In some cases that environment is a human body. But not all bacteria are bad. Some bacteria are good for our bodies; they help keep belongings in balance. Good bacteria live in our intestines and help us use the nutrients in the food we eat and make waste from what is left over. We could not make the most of a healthy meal without these
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CORE BIOLOGY PRACTICALS You will need to know these practicals as the exam board may ask you questions based on them. Below is a summary of each one. Name of practical and independent & dependent variables Effect of caffeine on Daphnia heart rate Independent: caffeine concentration Dependent: heart rate of Daphnia Measuring the content of Vitamin C in fruit juice Independent: fruit juice Dependent: volume of juice required to decolourise 1cm3 of DCPIP The effect of temperature on cell membranes
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are essential for normal body function. These essential chemicals are called nutrients. You need nutrients for normal growth and development‚ for maintaining cells and tissues‚ for fuel to do physical and metabolic work‚ and for regulating the hundreds of thousands of body processes that go on inside you every second of everyday. Further‚ food must provide these nutrients; the body either cannot make these essential nutrients or cannot make enough of them (Bredbenner‚ 2011). Nutritional assessment
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Katy Hill Compare & Contrast Compare & Contrast: Traditional Schooling vs. Online Classes I mark a subset of the areas needing improvement. These comments are in text bubbles on the right. If you do not see them‚ make sure you are viewing your document in print view. If you do not have Microsoft Word‚ download and install the Word viewer. http://www.microsoft.com/downloads/details.aspx?FamilyID=3657ce88-7cfa-457a-9aec-f4f827f20cac&displaylang=en Start the Word Viewer and open your
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to analyse many biological samples to estimate molecular weights and for purification. For example globular proteins‚ urea‚ phenol‚ enzymes‚ antigens‚ DNA. The proteins will be collected into the fractions and then examined by a spectrometer for identifying which globular protein the fraction consists
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disrupting normal synaptic communication between brain cells and neurofibrillary tangles contribute to the death of individual neurons by destroying the “supply line” within the cell. Tau proteins disengage (the glue that holds microtubules together) and nutrients cannot be transported throughout the cell resulting in cell death. The Mayo Clinic states that “less than 5% of the time‚ Alzheimer’s disease results from combination of genetic‚ lifestyle and environmental factors that affect the brain over time”
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As Martin Buber once said‚ “an animal’s eyes have the power to speak a great language”. As the years go by‚ numerous animals are becoming extinct by man’s lack of compassion. They used to roam freely‚ without fear‚ in the wild‚ although; with rising population‚ the wilderness is no longer their home. Therefore‚ the animals are forced to share their land with uncompassionate humans. One example is the Borneo Pygmy Elephant found in Southeast Asia. Their thriving population has diminished to less than
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same crops were then sold in the market! As I recounted the experience of what I saw‚ I could immediately connect to my biology course where I learnt about the environmental effects of heavy metals. This made me think‚ although zinc is an important nutrient for both plants and humans‚ very high concentrations can have adverse effects on both‚ plant and human life. Crop yields being ever low in my uncle’s farm made me question. What was actually responsible for the death of so many plants? Why was Zinc
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of fungi. There are many different kinds of molds‚ some of which are specially adapted to grow in particular environments or on particular surfaces. Unlike plants‚ molds cannot produce their own food‚ so they need an external source of energy and nutrients. Molds (and mildew) are fungi. Fungi are neither plant nor animal but‚ since 1969‚ have their own kingdom. The fungi kingdom includes such wonderful organisms as the delicious edible mushrooms‚ the makers of the "miracle drug" penicillin and the
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leg‚ are examined. · Systemic anatomy · body structure is studied system by system · Surface anatomy · the study of internal structures as they relate to the overlying skin surface · ex: identifying bulging muscles beneath a bodybuilder’s skin · Microscopic Anatomy · Very small structures · Can only be viewed with a microscope · Cytology · considers the cells of the body · Histology · the study of tissues
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