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What is the job of a centriole in a cell?

During the first phase of cell division in animal cells, centrioles replicate to form copies of themselves. According to Molecular Expressions, cell biology researchers are not yet sure how the duplication takes place. Before cell division starts, the centrioles live together in a pair of two groupings of microtubules. As cell division progresses, the original grouping disintegrates into two individual groupings that move to opposing poles of the cells.\nThe microtubules organize themselves into spindle-shaped structures that span the entire cell. The spindle-shaped fibers help in the alignmen..

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What materials can be used to make a DNA model?

To make a DNA model out of pipe cleaners, cut six different-colored pipe cleaners into one-inch-long pieces. Reserve two colors to represent the pentose sugar and phosphate molecule while the rest represent the four nitrogenous bases: adenine, cytosine, guanine and thymine. Use the pipe cleaner pieces that represent the pentose sugar and the phosphate molecule to make two long strings. Form each string by alternating and joining the two colors. Make pairs with the remaining pipe cleaner pieces such that the color which represents adenine pairs with that of thymine and the same for cytosine and..

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What are the intermediate colors?

Secondary colors are orange, green and violet, while primary colors are red, blue and yellow. Primary colors are the basis for all of the other colors that exist on a color wheel. No matter what shade, they will be some form of red, blue or yellow. The secondary colors are direct combinations of these three colors. Orange is made by mixing yellow and red; green is made by mixing yellow and blue; and violet is made by mixing red and blue.The colors that make up these intermediate, secondary and primary colors are often found on color wheels. Color wheels show the way that colors transfer betwee..

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What is reversible ischemia?

Web MD describes ischemia as the narrowing of blood vessels. In some cases, according to Better Medicine, ischemia is treatable with medication or surgery, which commonly involves widening the narrowed blood vessels. Better Medicine also states that ischemia, if left untreated, can cause heart attacks and strokes, and, even if the ischemia is reversible, it does not get better without treatment. Therefore, if someone suffers from chest pain or pressure, which can be an indication of acute ischemia, it is advisable to seek immediate medical treatment.

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What are five physical properties of matter?

The physical properties of matter describe the appearance or composition of a substance that can be observed without making any changes to the matter. According to Texas A&M University, the properties of matter can be either intensive or extensive. Intensive properties include color, odor, hardness and density. Extensive physical properties include its mass, weight and volume.\nIntensive physical properties are characteristics that don't change regardless of the amount of matter being observed. For instance, the hardness of a diamond remains the same even if it's cut in half. Extensi..

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What are some facts about water conservation?

Landscaping and lawn maintenance often accounts for as much as 60 percent of household water consumption. Landscaping designs that feature native plants, xeriscaping, and ensuring lawns are being watered as efficiently as possible can all reduce water consumption. Limiting turf areas, using mulch around plants to better conserve moisture, and improving soil quality to ensure landscaping plants develop deeper root systems can also reduce the amount of water needed to maintain yards and lawns.\nWater conservation tips include keeping showers that are no more than five minutes in length and using..

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What is the definition of "dialkylamine"?

The International Unit of Pure and Applied Chemistry (IUPAC) name for dialkylamine is N-hexadecylhexadecan-1-amine. It has a chemical formula of C32H67N and a molecular weight of 465.88108 [g/mol]. The properties of secondary amines such as dialkylamine are heavily influenced by hydrogen bonding. Their boiling points are higher than phosphines but lower than alcohols. Secondary amines can react with acyl chlorides and acid anhydrides to form amides in the Schotten–Baumann reaction.

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Why do floods occur?

Flash floods occur when there is a high accumulation of water in a low-lying area within a period of six hours. These flooding events are potentially dangerous as they often result in swift-moving water knocking down trees and wiping out bridges and buildings. While flash floods happen with the collapse of a dam or other water-containing structure, they typically happen following large rainstorms.\nThe Pacific Ocean sends heavy rainfall to the West Coast during the winter months. The East Coast and southern United States tend to see more flooding during the summer months as moisture and warm a..

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What is cobalt (II) hydrogen carbonate?

Scientists call atoms with electrical charges ions, and these ions describe the way they combine to form compounds as ionic bonding, according to the Virtual Chembook of Elmhurst College. The number of electrons and protons in an ion determine its charge and the means by which it can form an ionic bond with other atoms and molecules. HCO3- and Co2+ combine with one another to form cobalt (II) hydrogen carbonate at a 2:1 ratio because of their respective proton and electron balances.\nElectricity conducts well through ionic compounds like cobalt (II) hydrogen carbonate because of the electrical..

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What is an example of the adiabatic process?

In the adiabatic process, energy is transferred through work rather than heat. For example, when air or other gases are compressed, the gas becomes hot. The opposite is also true because gas cools when it expands quickly. However, the quick expansion or compression of gas is not completely adiabatic. Temperature changes do occur in an adiabatic process, but energy is not transferred outside of the system through that temperature change.

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