The problem: Answer a question about this article:
Epigenetics is the study of mitotically and/or meiotically heritable changes in gene function that cannot be explained by changes in the underlying DNA sequence but cause the organism's genes to behave (or "express themselves") differently. One example of epigenetic change is the marking of the genes by DNA methylation which determines whether they will be expressed or not. Gene expression can also be controlled by repressor proteins that attach to silencer regions of the DNA and prevent that region of the DNA code from being expressed. Epigenetic marks may be added or removed from the DNA during programmed stages of development of the plant, and are responsible, for example, for the differences between anthers, petals and normal leaves, despite the fact that they all have the same underlying genetic code. Epigenetic changes may be temporary or may remain through successive cell divisions for the remainder of the cell's life. Some epigenetic changes have been shown to be heritable, while others are reset in the germ cells.
What is a result of changes in DNA markers within a plant species?
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The answer: differences


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At the start of a classic valley glacier is a bowl-shaped cirque, which has escarped walls on three sides but is open on the side that descends into the valley. Cirques are where ice begins to accumulate in a glacier. Two glacial cirques may form back to back and erode their backwalls until only a narrow ridge, called an arête is left. This structure may result in a mountain pass. If multiple cirques encircle a single mountain, they create pointed pyramidal peaks; particularly steep examples are called horns.
On which side is a cirque opened?
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The answer: the side that descends into the valley


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The Armenian Genocide caused widespread emigration that led to the settlement of Armenians in various countries in the world. Armenians kept to their traditions and certain diasporans rose to fame with their music. In the post-Genocide Armenian community of the United States, the so-called "kef" style Armenian dance music, using Armenian and Middle Eastern folk instruments (often electrified/amplified) and some western instruments, was popular. This style preserved the folk songs and dances of Western Armenia, and many artists also played the contemporary popular songs of Turkey and other Middle Eastern countries from which the Armenians emigrated.
What is kef?
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The answer: Armenian dance music, using Armenian and Middle Eastern folk instruments


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Pharmaceutical companies whose products are used in the three-drug cocktails for lethal injections are predominantly European, and they have strenuously objected to the use of their drugs for executions and taken steps to prevent their use. For example, Hospira, the sole American manufacturer of sodium thiopental, the critical anesthetic in the three-drug cocktail, announced in 2011 that it would no longer manufacture the drug for the American market, in part for ethical reasons and in part because its transfer of sodium thiopental manufacturing to Italy would subject it to the European Union's Torture Regulation, which forbids the use of any product manufactured within the Union for torture (as execution by lethal injection is considered by the Regulation). Since the drug manufacturers began taking these steps and the EU regulation ended the importation of drugs produced in Europe, the resulting shortage of execution drugs has led to or influenced decisions to impose moratoria in Arkansas, California, Kentucky, Louisiana, Mississippi, Montana, Nevada, North Carolina, and Tennessee.
How many drugs are used to administer lethal injection?
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The answer:
three