The problem: Answer a question about this article:
The verbs of most aspect pairs differ in one of two ways: by prefix or by suffix. In prefix pairs, the perfective verb has an added prefix—for example, the imperfective psát (to write, to be writing) compared with the perfective napsat (to write down, to finish writing). The most common prefixes are na-, o-, po-, s-, u-, vy-, z- and za-. In suffix pairs, a different infinitive ending is added to the perfective stem; for example, the perfective verbs koupit (to buy) and prodat (to sell) have the imperfective forms kupovat and prodávat. Imperfective verbs may undergo further morphology to make other imperfective verbs (iterative and frequentative forms), denoting repeated or regular action. The verb jít (to go) has the iterative form chodit (to go repeatedly) and the frequentative form chodívat (to go regularly).
What is added to the ending in suffix pairs?
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The answer: different infinitive ending


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Genes are regulated so that they are expressed only when the product is needed, since expression draws on limited resources.:7 A cell regulates its gene expression depending on its external environment (e.g. available nutrients, temperature and other stresses), its internal environment (e.g. cell division cycle, metabolism, infection status), and its specific role if in a multicellular organism. Gene expression can be regulated at any step: from transcriptional initiation, to RNA processing, to post-translational modification of the protein. The regulation of lactose metabolism genes in E. coli (lac operon) was the first such mechanism to be described in 1961.
When are genes expressed?
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The answer: only when the product is needed


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The relationship between ethnic Greek identity and Greek Orthodox religion continued after the creation of the Modern Greek state in 1830. According to the second article of the first Greek constitution of 1822, a Greek was defined as any Christian resident of the Kingdom of Greece, a clause removed by 1840. A century later, when the Treaty of Lausanne was signed between Greece and Turkey in 1923, the two countries agreed to use religion as the determinant for ethnic identity for the purposes of population exchange, although most of the Greeks displaced (over a million of the total 1.5 million) had already been driven out by the time the agreement was signed.[note 1] The Greek genocide, in particular the harsh removal of Pontian Greeks from the southern shore area of the Black Sea, contemporaneous with and following the failed Greek Asia Minor Campaign, was part of this process of Turkification of the Ottoman Empire and the placement of its economy and trade, then largely in Greek hands under ethnic Turkish control.
What factor was used to expel or include citizens in the  Lausanne Treaty ?
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The answer: agreed to use religion as the determinant for ethnic identity for the purposes of population exchange


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The gender of God may be viewed as either a literal or an allegorical aspect of a deity who, in classical western philosophy, transcends bodily form. Polytheistic religions commonly attribute to each of the gods a gender, allowing each to interact with any of the others, and perhaps with humans, sexually. In most monotheistic religions, God has no counterpart with which to relate sexually. Thus, in classical western philosophy the gender of this one-and-only deity is most likely to be an analogical statement of how humans and God address, and relate to, each other. Namely, God is seen as begetter of the world and revelation which corresponds to the active (as opposed to the receptive) role in sexual intercourse.
In what ways can the gender of God be viewed?
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The answer:
literal or an allegorical aspect