Tejas Patni asked   •  6 hours ago

Fast food chains constantly face the problem of low employee retention, to counter which the companies offer high salaries. The companies have come up with the solution of hiring retired people who have a very low attrition rate. However, their time taken to service an order is more and they require going through long training programs at regular intervals. Thus, for most fast food chains the gain in employee retention does not compensate for the increase in time taken to serve each customer. Nevertheless, since the customers continue to be more appreciative when served by retired people, their employment is likely to become an industry-wide feature.
In the argument above, the two portions in boldface play which of the following roles?
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Aaditya Sharma asked   •  3 days ago

Proverbial wisdom states that “birds of a feather flock together.”  Studies have shown that people of similar geographical and educational backgrounds and functional experience are extremely likely to found companies together.  Not considering spousal teams in the dataset, it has been found that a founding team is five times more likely to be all-male or all-female team.  Also, it is more likely to find founding teams that are remarkably homogenous with regard to skills and functional backgrounds.  

Homogeneity has important benefits. For the founder struggling to meet the challenges of a growing startup, selecting cofounders from among the people with whom he or she probably has important things in common is often the quickest and easiest solution. Not only does it generally take less time to find such people, but it also generally takes less time to develop effective working relationships with such similar people.  When founders share a background, they share a common language that facilitates communication, ensuring that the team begins the work relationship with a mutual understanding and hence can skip over part of the learning curve that would absorb the energies of people with very different backgrounds.  Increasing homogeneity may therefore be a particularly alluring- and, in some ways, a particularly sensible - approach for novice founders heading into unfamiliar territory.  Certainly, studies have found that the greater the heterogeneity among executive team members, the greater the risk of interpersonal conflict and the lower the group-level integration.  Even though it is very appealing to opt for the “comfortable” and “easy” decision to found with similar cofounders, by doing so founders may be causing long-term problems.  Teams with a wide range of pertinent functional skills may be able to build more valuable and enduring startups.  Conversely, homogenous teams tend to have overlapping human capital, making it more likely that the team will have redundant strengths and be missing critical skills.
From the passage, which of the following cannot be inferred as a benefit of homogenous teams?
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Aaditya Sharma asked   •  5 days ago

The role of nurturing in determining one’s behavioral traits has been hotly contested. Historically, geneticists believed that behavioral traits are inherited. After all, many properties of the brain are genetically organized and don't depend on information coming in from the senses. Since active genes are essentially inherited, most traditional geneticists believe that nurturing environment plays little role in shaping one’s behavioral traits.
However, a new line of research indicated that methyl groups can activate dormant genes, bringing about a slew of changes much later in a person’s life. The methyl group works like a placeholder in a cookbook, attaching to the DNA within each cell to select only those recipes - er, genes - necessary for that particular cell’s proteins, telling the DNA what kind of cells to form.  The first such observation was in which methyl groups activated by causes ranging from exposure to certain chemicals to changes in diet set off a cascade of cellular changes resulting in cancer. Because methyl groups are attached to the genes, residing beside but separate from the double-helix DNA code, their study is dubbed epigenetics - “epi” referring to Greek for outer or above. 
Behavioral geneticists, encouraged by this discovery proved that traumatic experiences such as child neglect, drug abuse, or other severe stresses also set off epigenetic changes to the DNA inside the neurons of a person’s brain, permanently altering behavior.  Similarly, through multivariate analysis, they proved that identical twins, in scenarios where one twin has gone through a life altering event, can have vastly different reaction to a stressful situation.
The primary purpose of the passage is to
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