COMMUNICABLE DISEASES Communicable diseases are those that are spread from one person to another person‚ from animal to animal‚ or from animal to person‚ or vice versa. It is likely that everyone will come down with a communicable disease at some point in their lives. It is important to learn about the causes of communicable diseases and ways to prevent their spread. For example‚ some may say that HIV is caused by sexual contact. This is not true. It is simply the way it is spread. Causes of communicable
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surface of water and mud. Algae were evolving at the water’s edge‚ and one group – probably the charophytes – gave rise to plants. Cooksonia‚ a simple branching plant a few centimeters tall‚ evolved by 430 million years ago. It took another 160 million years for the taller Psilophyton to evolve. Then the evolutionary pace picked up. It took only 60 million years for plants radiate from the swampy lowlands to high mountains and nearly all places in between. They did so through modifications in
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A world without plants Plants; probably the most ignored organism on this planet. People walk past plant and cut them down but nobody ever thinks about what they do for us‚ what the world would be if there was never any plants or photosynthetic organisms. If the world never had these organisms the world would be a desolate place. There would be no oxygen‚ atmosphere‚ or food. We inhale air unconsciously every day. By taking in air‚ we absorb oxygen and discharge carbon dioxide in the process of
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03.04 Soil and Impressions Soil For the forensic scientist‚ soil is more than dirt. Soil is thought of as surface material from the earth‚ both natural and artificial. In other words‚ soil includes not only dirt but also rocks‚ animal material‚ and vegetation that lie near the surface of the ground. In addition‚ it may include pieces of glass‚ fragments of brick or stone‚ and pieces of asphalt. The combination of things in the soil may help link a suspect to the crime scene if the soil is somehow
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Plant Tour Experience in Wyeth Philippines At Canlubang‚ Laguna Visiting a prestigious plant was a great experience. On that day the feeling of excitement was surrounding me. It was my first time having an educational tour. During the road trip everyone was enjoying talking and cracking some hilarious jokes and enjoying as if we were just a kid that was having a field trip. When we had arrived at Canlubang I was so excited to enter the plant because I was so curious about what was the inside
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Plant cells are eukaryotic cells that differ in several key aspects from the cells of other eukaryotic organisms. Their distinctive features include: A large central vacuole‚ a water-filled volume enclosed by a membrane known as the tonoplast maintains the cell’s turgor‚ controls movement of molecules between the cytosol and sap‚ stores useful material and digests waste proteins and organelles. A cell wall composed of cellulose and hemicellulose‚ pectin and in many cases lignin‚ is secreted by
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Plant Cell Plant cells have many different parts that are need to work together and function as a whole. These parts are the cell membrane which can be compared to a "Condom" due to the fact that is a very thin protective layer that lets certain substances to pass through. Cell wall is a thicker rougher membrane‚ which gives the plant most of its structure and support‚ the cell wall also bond with other cell walls to form the structure of the plant. Centrosome may be also referred to as the
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Gene Cloning of Cucumber Mosaic Virus and Some Related Viral Agents 1.1 Introduction Cucumber mosaic virus (CMV) is a typical member of the genus Cucumovirus. It has infected more than 1‚000 species of monocots and dicots‚ including many economically important crops (Palukaitis and García-Arenal‚ 2003; Palukaitis et al.‚ 1992). In China‚ CMV is commonly detected as the principal virus infecting field crops in the families Solanaceae (including tobacco‚ tomato‚ potato‚ pepper‚ etc.)‚ Brassicaceae
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Geotechnical Engineering Practice | August 19‚ 2012 1 The origins of soil deposits on the earth’s crust can reveal significant findings in the chemical and mechanical characteristics of the soils themselves. It is important to uncover such origins to find how and where such deposits may have formed over tens of thousands of years ago. Marine and Lacustrine deposits are two soil types that are commonly encountered during soil exploration‚ both of which are primarily traced back to either glacial
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Lyme Disease Lyme Disease An emerging public health concern in the New River Valley is the increase in reported cases of Lyme disease. According to the Centers for Disease Control and Prevention (CDC)‚ “Lyme disease is the most commonly reported vectorborne illness in the United States‚” although it is concentrated primarily in only thirteen states. The New River Valley reported a record number of cases in 2012‚ and is considered endemic to Lyme disease per the Virginia Department of Health
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