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How do people cause pollution?

Pollution stems from many sources and takes various shapes. It exists in air, water and in land. Air pollution derives from toxic emittants, such as fossil fuels escaping into the atmosphere. Air pollution arises from the bio accumulation of certain contaminants in the air. These noxious particles include particulate matter, ozone in the lowest levels of Earth's atmosphere, nitrogen and sulfur oxides and carbon monoxide. These particles reduce air quality in local and regional atmospheres. They also increase local quantities of smog and trap heat, ultimately contributing to global warming..

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What is the purpose of data management systems?

A DMS is essential for keeping data accessible and well organized. It allows users to access and modify data, no matter where they are, and keeps the data well controlled. The users who modify files never need to know where the data is stored, keeping the data protected.There are several types of DMS servers in use. They include cloud-based data management systems, NoSQL servers and in-memory database management systems. Each has its own advantages and disadvantages, and some are more practical that others, depending on the type of data being manipulated and stored.

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What are some important apparatus in a chemistry laboratory?

Hands-on laboratory experiments are an important part of a chemistry class. According to the American Chemical Association, these experiments allow students to learn the different chemistry apparatus and experience different chemicals and their reactions. For example, Bunsen burners use flames from gases such as butane to heat and sterilize. Erlenmeyer flasks are useful for preventing spillage when stirring liquids and preventing evaporation when heating. Test tubes are used when a small amount of a chemical is needed and have a flared top to assist with pouring.

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How do I describe meiosis?

Mitosis is the way cells divide, reproduce and grow, and meiosis extends the process one step further. In meiosis, a cell grows larger. In the nucleus, or brain, of the cell, the DNA contained within duplicates so that there are two distinct sets of genetic information. These two sets separate into the different sides of the nucleus, and the cell divides into two separate cells. In mitosis, cell division stops at this phase, but in meiosis it continues.\nIn order for meiosis to occur, these resulting cells must divide further. The two daughter cells split their DNA into two groups, then divide..

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What role does the thyroid gland play in the human body?

The pituitary gland monitors the levels of hormones in the bloodstream and sends an activation signal to the thyroid gland when levels of the hormones called T3 and T4 are low. These are the metabolism-regulating hormones produced by the thyroid gland, and when it receives the production signal from the pituitary gland, T3 and T4 are produced and secreted.When the thyroid gland is unable to produce the called-for amounts of T3 and T4, which results in a slowing down of the body's metabolism, the condition is referred to as hypothyroidism. Some of the symptoms resulting from hypothyroidism..

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What are the disadvantages of artificial fertilizers?

The nutrients in artificial fertilizers do not stay in the soil for very long. For this reason, gardeners must apply inorganic fertilizers to their soil more often than organic fertilizers. Inorganic fertilizers that release their nutrients into the soil more slowly, and thus require fewer applications, are available from some manufacturers.\nArtificial fertilizers go through a manufacturing process, while organic fertilizers, such as manure, typically do not undergo this type of treatment. The treatment process creates fertilizers that are very high in the three primary nutrients plants need..

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Can tornadoes be prevented?

Rongjia Tao is the scientist who proposed the wall-building plan. Tao proposes building three walls, one stretching from the east to west in North Dakota, another on the border between Kansas and Oklahoma, and a third stretching across the southern part of Texas and into Louisiana. These walls would have to be 1,000 feet high and 150 feet wide. The idea behind these walls is to block the clashes of warm air from the south and cold air from the north that start thunderstorms and tornadoes. Other scientists doubt the efficacy of this plan, pointing out that we have mountain ranges of similar siz..

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What are primary consumers in grassland areas?

The primary consumers of the African Savannah include impalas, cows, zebras and warthogs. Central Eurasian steppes have similar species of rodent-type plant eaters as well as deer, zebra and gazelle. The United States prairies have plant eaters such as prairie dogs, grasshoppers, jackrabbits and pronghorn antelope.\nAll primary consumers, no matter where in the world the grassland is located, tend to be grazers, such as deer and cows, or burrowers, such as mice and rabbits.\nThese animals eat the grasses and shrubs. These plants are known as producers. Plants, or producers, feed the primary co..

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Where does DNA replication take place in a eukaryotic cell?

DNA replication occurs in many steps. First, the double-stranded DNA must be unzipped and separated. Once separated, the unpaired nucleotides on each strand act as a template for new nucleotides to arrive and pair up. New strands of nucleotides are assembled, and they become covalently bonded to the two separate, single strands of DNA. The nucleotides assemble in a complementary order and fuse with the single-stranded DNA to form two new daughter strands of DNA that can exit the cell.

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What is thermoregulation?

The human body regulates temperature by balancing the amount of heat lost and gained. Thermoregulation is important because the cells in the body need a specific temperature to work properly. The human body uses temperature receptors located throughout the body to make physiological adjustments and maintain a constant core temperature. The skin controls the temperature of the body and protects the internal organs from external conditions. For instance, when a person is in a hot environment, the blood vessels widen to release sweat through the pores and cool the body. When the surroundings are ..

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