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Biology Essay

Discuss the phenomenon of harmful algal blooms
It can be extremely dangerous when the water is clear with low concentration of cell in the presence of toxic HABs. Micro or Macro-algae is termed for seaweeds as well which sometimes out grows and causes serious ecological problems like habitat alteration, indigenous species and lowers oxygen level in deep water.Moreover, some HABs are not algae but small animals, who do not grow with photosynthesis but get their nutrition by grazing. A continuous research is going on since decades to get to
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Darwin had during the Voyage of the Beagle that led to each of the component parts of his Theory of Evolution (Descent with Modification) that eventually appeared in his book the Origin of Species
For example, a bird with a distinct beak shape passes this on to some or all of their offspring. Not all variation was heritable; some variation was not passed on from parent to offspring, but was a result of environmental changes, such as hair color as a consequence of exposure to sunlight. This was important for Darwin’s theory of evolution, as for traits to change over time; there was a need for the ability for them to be passed from one generation to the next.When individuals produced
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The Hygiene Hypothesis
Some of the common allergens, i. substances that cause allergic attacks, include pollen, dust, hay, household chemicals, synthetic material, pet fur, some foods and some food preservatives. When these come into contact with the body of the allergic person, his/ her system activates the white blood cells in response to the foreign negative stimulus. (These cells normally help us to fight disease-causing microorganisms). Once released, the white blood cells cause an inflammatory reaction
Pages: 5 (1250 words), Essay
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To answer one of following questions: 1) Critically evaluate the claim that feeding behaviour is controlled by biological factors. OR 2) Critically evaluate the relationship between Parkinson's disease and impulse control disorders
(Hakala, 2009, p. 85) If it were damaged, the brain would be incapable to tell the person that he is full because no signal is being transmitted and, thus, he will continue to eat. If an injury affects the lateral hypothalamus, it will result in a sharp downturn in the individual’s motivation to eat and he will not feel the motivated to eat or motivated to eat. 85) This point is explained further in the following section.Feeding is an action that involves an array of variables. First, there
Pages: 6 (1500 words), Essay
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Patient Scenario: Diagnosed with Prostrate Cancer
High blood pressure increases the workload on heart muscle. To compensate for the increasing demand, left ventricle undergoes remodeling and hypertrophy, which in turn puts the person at an increased risk of arrhythmias, sudden death and heart failure in the long run. The vessels are also damaged as a result of atherosclerosis, and the end organ effects are evident in the form of retinopathy, nephropathy and stroke (Porth, 2007). Based on the data provided, what laboratory tests were performed
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Bacterial plant pathogens in soil
In agriculture, one of the factors that can be tweaked to improve sustainability of a practice is the soil management. Soil is a vital tool of agriculture, as it houses many factors that affect plant growth such as organic material, water and soil bacteria.Bacteria are everywhere. We might not notice them because we cannot see them, but they are important to us, most noticeably because some of them cause harm to humans and animals. However, they perform different functions that are vital to our
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Wooly nightshade
Addition, it produces a strong kerosene smell whenever the leaves are crushed and has the ability to flower throughout the year, producing berries during late spring and summer – they are first green and then turn to yellow when ripe (Ramel, 2012). Because of its fast growth, the woolly nightshade usually tends to grow taller than most plants in its surroundings (up to 30 metres tall) to become the dominant plant, so it can cover a very vast region within a relatively short period. This pest
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The bio control of buddleia davidii
The adult Cleopus weevil is grey and approximately 4 mm in length. These weevils get said to originate from china too. In New Zealand, the weevils got used as a sustainable weed control method adopted from China. The weevil got chosen as the control agent as it got observed that it only ate the Buddleia leaves.The weevils only get to eat the Buddleia. The weevils lay their eggs on the Buddleia leave bushes. The eggs hatch into small maggots, which defoliate the plant by eating away its leaves
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Human Biology
Satellite cells are situated in dorsal root ganglia somewhere in either side of the spinal cord and they enclosed cell bodies containing sensory neurons that are found inside the ganglia (Tiidus, 2008, p.Ordinary staining technique could not enhance visibility of the collagen fibres of hyaline cartilage (Amitrano and Tortora, 2012, p. Protoplasm and nuclei under intranuclear network are found in this specimen.Giemsa method of staining can be effective when applied in bone connective tissues
Pages: 6 (1500 words), Essay
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DNA fingerprinting
RFLPs are the oldest type of DNA finger prints. For this process, a sample from any part of the body is collected since all the nucleated cells of the body contain DNA. After the sample is collected, DNA is extracted from the sample by using restriction enzymes(Crocket 2001). Restriction enzymes are highly specific enzymes for specific sequences of DNA and they act on and cleave only the sequences they are programmed for. After the DNA samples are properly extracted, specific band patterns are
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Grant Proposal
According to the Environmental Protection Agency (EPA) of the United States, an air cleaner is designed to remove certain pollutants such as particles, gases and may carry pollutants destruction using technologies such as UV light technology (Environmental Protection Agency 1)Plants that absorb air pollutants may alleviate the presence of volatile organic compounds that may contaminate the indoor environment (Girman et al 1). Common air pollutants that may be found in an indoor setting include
Pages: 7 (1750 words), Essay
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Evolution in Health and Disease
However, with the case of a variety of pathogens, the ability to morph, change, and alter the way in which they react to certain substances and environments means that pathogens that had been able to be treated using a variety of different means can eventually become somewhat immune to such efforts and require the medical community to actively engage and seek out new ways in which to stop the spread of disease; oftentimes utilizing entirely different means than the pathogen itself has become
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Clostridium Difficile
Difficile was the major cause of severe CDI cases (McCollum and Rodriguez 2012). This strain has resistance to fluoroquinolones and secretes different toxins. difficile is widely dispersed in the environment and is also part of bowel flora in about 2% normal adults (Wilcox 2003). This percentage increases with age, making the elderly more prone to CDI than the young adults. Older adults may have 10% to 20% colonization rates, depending on the length and frequency of exposure to antibiotic
Pages: 8 (2000 words), Essay
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Topic Collection 1
Those that result from natural conditioning have humans no powers to control them while those resulting from human activity can have control from the humans. A number of facts reflect these views and their influence on the way of life.FACT 1: Amino acids band together from compounds in the earth’s primitive atmosphere. Considering the worldview that regards the natural formations as a way of life, the formation of Amino Acids is a natural process that involves natural forces of formation. The
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SCIENTIFIC CONCEPTS, THEORIES, & INQUIRY
Dependent variable is the plant growth while independent variable is the light intensity. The level of exposure of light to the plant will determine growth rate. When the light intensity level that reaches the plant is small, the growth rate is also affected greatly. Regions that receive enough light experience fast plant growth. The controlling variables are temperature and humidity. Using a 100 watts bulb as the light source, the first container was placed in areas exposed to 24 hours of
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Primary and secondary infection with Mycobacterium tuberculosis
From a different angle of view, treatment for primary infection can hinder the rapid spread of secondary infection because. Sterling et al.2156) state that ‘More than 2 billion persons are infected with Mycobacterium tuberculosis, and from this reservoir active tuberculosis will develop in millions of persons in coming decades.’ For instance, medical treatment can hinder the spread of Mycobacterium tuberculosis from person to person and can save millions of people. Nowadays, treatment for
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GMO the Necessary Evil
Found in GMO are the cause of malformation chicken embryos and these effects were evident to human birth defects in areas associated with genetically modified soy production. To be precise the researchers found malformation of the head were the new borne had a single eye (Wald and Michael 44). With long term exposure to genetically modified organisms the data relating to the diverse effects will only increase as we continue to feed on GMOs without giving thought the negative effects they can
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Peer-reviewed journal article
The authors actually found that myocardial hypertrophy is dependent on exercise-induced arterial hypertension, confirming that there was a hypertensive response in athletes as a result of exercise. The athletes with exercise-induced arterial hypertension also showed increased left ventricular mass at 205g/m2, especially in comparison to athletes without exaggerated response in BP to exercise who had a left ventricular mass of 143g/m2 (Leischik et al, 2014). In addition, the findings also show
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Biology summary of one cephalopod, one bivalve and one chiton of your choosing
Through tight spaces, are intelligent, fast and can mimic shapes of other creatures when hunting for food and are able to avoid predation due to their speed, ability to camouflage, presence of venom and expulsion of ink (Campbell & Reece, 2005, p.An example of a bivalve is a scallop. Scallops belong to the kingdom animalia, phylum millusca, class bivalvia, order ostreoida, sub-orders pectinoida and pectinina, superfamily pectinoidea and family pectinidae. Scallops are bilaterally symmetrical
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Homeostasis and transpot
They facilitate the flow of the respiratory gasses. Venules are smaller than the capillaries. They receive blood from the capillaries and transport them to the veins. Venules transport blood from the capillaries into the veins so that they are returned back to the heart. Veins have thin and less elastic tissues. They also have valves that ensure that the blood flow in one direction. They carry deoxygenated blood except the pulmonary veins.Anemia is a condition whereby there is a low number of
Pages: 8 (2000 words), Essay
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