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What are disadvantages of light microscopes?

Visible light restricts the amount of resolution achieved with a light microscope. Magnification may range from 500x to 1500x, which is much smaller in comparison to electron microscopes; these give magnifications of 160,000x or more. In general, light microscopes require specimens to be thin, small and transparent for optimum viewing. The development of the electron microscope in the 1930s gave scientists greater freedom in viewing minute details of cellular structure.

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How do transient microbiota differ from normal microbiota?

Normal microbiota have a symbiotic relationship with the organisms they inhabit. While the host organism provides them with a safe place to grow, they provide the host with several benefits. One of the greatest benefits is preventing colonization by harmful bacteria. The normal microbiota consume nutrients and take up space, both resources that opportunistic, harmful bacteria would otherwise use to harm the host. Certain normal microbiota also produce substances that prevent harmful bacteria from growing.

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How can you reduce noise pollution?

High-quality windows minimize noise in addition to reducing utility bills. Replacing negative sounds with pleasant sounds also helps reduce noise pollution. Listening to music with headphones drowns out excess noise. Turning off electronics cuts down on the amount of noise pollution, and it minimizes distractions and stress within the home. Placing a bookshelf against the wall prevents noise pollution from entering the walls. Adding carpeting to wood floors absorbs chaotic noise. Waiting until you are not at home to turn on the dishwasher and laundry appliances is a good way to avoid extra noi..

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How are rivers created?

Gullies gain strength as they merge with several tributary streams along the higher points of elevated surfaces. As the river travels down these hills or mountains, they form depressions called valleys. The river continues to flow downstream, gathering pieces of rock and breaking them down with its flowing movement. Once the stream reaches flatter ground, the broken down pieces of sediment solidify the makeup of the river by depositing themselves to the bottom. The river continues to flow, but at a slower pace in the shape of an S called a meander.\nMost rivers form on the surface, but they ca..

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What is the solubility of acetanilide?

Acetanilide, discovered by the American biochemist Julius Axelrod, is a chemical compound characterized by its leaf or flake-like shape. It is a brilliant, odorless substance that exists as a white, crystalline powder at room temperature. Acetanilide is formed from the chemical reaction of aniline and acetic anhydride. The compound is generally used as an inhibitor in the breakdown of hydrogen peroxide. Other applications of acetanilide include being used as a stabilizing agent for cellulose ester varnishes and as an essential component in dye, rubber accelerator and camphor syntheses.Acetanil..

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What is the biological importance of lipids?

Lipids perform a variety of functions in a biological system. They contribute to the structure of plasma membranes that enclose both cells and cellular organelles. Lipids also protect the organism from drying out. In humans, lipids are found in skin cells, where they prevent dry skin and keep water molecules inside of the body. Lipids insulate organisms against extreme environments, and they also regulate the activities of many hormones and enzymes.

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How did Galileo Galilei die?

Throughout his life, Galileo faced years of controversy and even imprisonment for his scientific theories. His redemption came many years after his death, when he was reburied on sacred ground at Santa Croce in 1737. Four years later, in 1741, Pope Benedict XIV authorized the publication of Galileo's complete works. To date, he is known as the father of modern science, physics, astronomy and observational science.

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What causes earthquakes?

Most of the earthquakes are too small or too far below the earth's surface for people on the surface to feel. Most earthquakes occur 50 or more miles below the surface of the earth. Some happen in the deep sea and are not felt by humans. Powerful earthquakes can be felt thousands of miles away and can cause landslides, tsunamis, flooding and widespread destruction. In heavily populated areas, death and property damage occurs. This is because the shaking causes structures to collapse and fires to erupt.\nEarthquakes are measured using seismometers. Earthquakes often occur in volcanic regio..

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What is a real life example of osmosis?

In very simple terms, osmosis is the movement of water across a selectively permeable membrane. The process is driven by a difference in solute concentrations on each side of the membrane. Osmosis occurs in almost all animals cells. Indeed, simply hydrating the body with a refreshing glass of water is a living example of the osmosis process.The pruning of the extremities after a long bath or a swim is a good example of osmosis because many people assume that the fingers have wrinkled because they have lost water. In fact, fingers prune in water due to osmosis, as the external water around the ..

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What are the three types of archaea?

The crenarchaeota are able to endure both extreme temperatures and extreme acidity. They come in rod, cocci, filamentous and unique shapes. Thermophiles, those preferring high temperatures, and psychrophiles, those preferring frigid temperatures, fall into this category. The euryarchaeota include methanogens, which produce methane, and halophiles, which favor environments high in salt. The korarchaeota is a hodge-podge of other archaea that do not fit into the other categories.

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