Designed to relentlessly replicate‚ computer viruses infect your programs and files‚ alter the way your computer operates or stop it from working altogether. It’s estimated that the Conficker virus infected more than 10 million computers in 2009. Tens of thousands of computer viruses now operate over the Internet‚ and new computer viruses are discovered every day. How does a computer virus find me? Even if you’re careful you can pick up computer viruses through normal Web activities like: Sharing
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Bacteria are the most ancient life forms‚ most bacteria are so small that under a light microscope you can only see them as little dots. Some groups however grow to larger sizes and have spectacular shapes (1). Bacteria are present in most habitats on the planet‚ growing in soil‚ water‚ acidic hot springs‚ radioactive waste‚ and deep in the Earth’s crust‚ as well as in organic matter and the live bodies of plants and animals (2). Bacteria is mostly thought of as a pathogen‚ while it is true that
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The concept of viruses being living or non-living has been greatly debated throughout the scientific community‚ essentially because of varying differences in scientist’s definitions of what constitutes life. Furthermore‚ scientists also disagree on the degree to which viruses fit into the living or non-living category. There are seven fundamental components which can be used to define life. The first being that living things must maintain homeostasis; the ability for it to control its internal temperature
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Prevalence of trematode parasites in oreochromis niloticus harvested at Ggaba landing site. (fishing communities are faced with a challenge of close proximity with snails especially at a landing site with swampy areas since these are breeding sites for snails basing on parasitology studies trematodes use snails as intermediate hosts in their life cycle fish feed on snails and can also act as accidental hosts henceforth infecting humans) Hypothesis There are no trematodes in fish handled at Ggaba
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Questions: A. What are the advantages of using bleach as a disinfectant? The disadvantages? The advantages of using 70% alcohol? The disadvantages? 70% alcohol mixtures are capable of killing most bacteria within five minutes. However‚ the mixture is ineffective against spores and has limited effect on viruses. Additionally‚ the 70%
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different viruses so people can have it more than once. The differences between a virus and a bacterium are thus: * Bacteria are unicellular‚ Viruses have no cells. * Bacteria have DNA and RNA floating in cytoplasm‚ and a cell wall and membrane. Viruses have DNA or RNA enclosed in a protein coat. * Bacteria have Ribosomes‚ whereas viruses do not. * Bacterial infections are localised‚ yet viruses are systemic. As you can see‚ there are a load of differences between viruses and
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ANALYSIS OF BACTERIA GROWTH Abstract Bacteria can be found everywhere on the earth. Bacteria are single-celled organisms that lack a nucleus‚ mitochondria‚ and chloroplasts and are surrounded by a cell wall containing a peptidoglycan layer. They are defined by their small size and wide range of shapes. In this experiment we separated organisms in a mixed culture to study the colony morphology and physical characteristics and determine which organism was present in higher numbers‚ as determined
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many bacteria that we encounter in our daily lives and it was informative to know that all bacteria is not bad. In fact‚ there needs to be a balance between the two and by educating yourself with the smallest amount of new information is very helpful. Humans rely on micro-organisms for a variety of things varying from health‚ welfare‚ food‚ and industrial products. Micro-organisms are microscopic organisms and can only be seen properly with the aid of a microscope. This includes viruses‚ microscopic
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Having the ability to collect and identify unknown microorganisms is vital in health and medicine. This capability is important for a variety of reasons‚ such as knowing the causative agent of disease‚ knowing if the microorganism obtains any beneficial properties and knowing the correct microorganism to use to create a successful antibiotic. Implementing the experimental methods learned thus far in the microbiology laboratory allowed an unknown bacterium to be identified as a result of this study
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Table of contents Virus…………………………………………………………………………………………………………………….3 What is a computer virus?………………………………………………………………………………………………3 Effects of Computer viruses……………………………………………………………………………………………3 How to avoid Computer viruses?......................................................................................3 Different kinds of viruses………………………………………………………………………………………………..4 Symptoms of infect…………………………………………………………………………………………………………6 What to do?..........................................
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