In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Q: Article: Even before historian Joseph Ellis became a best-selling author, he was famous for his vivid lectures. In his popular courses at Mount Holyoke College in Massachusetts, he would often make classroom discussion lively by describing his own fighting experience in Vietnam. But as Ellis's reputation grew--his books on the Founding Fathers won both the National Book Award and the Pulitzer Prize ---the history professor began to entertain local and national reporters with his memories of war. Last year, after The Boston Globe reported Ellis's experience in the Vietnam war, someone who knew the truth about Ellis _ Last week The Boston Globe revealed that Ellis, famous for explaining the nation's history, had some explaining to do about his own past. "Even in the best of lives, mistakes are made," said Ellis. It turned out that while the historian had served in the Army, he'd spent his war years not in the jungles of Southeast Asia , but teaching history at West Point ( ). He'd also overstated his role in the antiwar movement and even his high-school athletic records. His admission shocked colleagues, fellow historians and students who wondered why someone so successful would beautify his past. But it seems that success and truthfulness don't always go hand in hand. Even among the successful achievers, security experts say, one in ten is deceiving. And, oddly, people often beautify their past once they're famous, says Ernest Brod of Kroll Associates, which has conducted thousands of background checks. Then what makes them do it? Psychologists say some people succeed, at least in part, because they are uniquely adjusted to the expectations of others. And no matter how well-known, those people can be haunted ( ) by a sense of their own shortcomings. "From outside, these people look anything but fragile," says Dennis Shulman, a psychoanalyst. "But inside, they feel hollow, empty,"
Answer: taught history at a military school

A: While Ellis served in the Army, he _
****
Q: Article: Older fathers have uglier children, researchers have claimed after linking age to genetic mutations . The finding comes weeks after leading scientists reported children born to men over the age of 45 run a higher risk of having autism and mental disorders. With age, sperm -producing cells do not copy a man's DNA as effectively, leading to genetic mutations. Martin Fielder, an anthropologist at Vienna University, told the Sunday Times: 'Every 16 years the mutation rate doubles. Other researchers found 25 mutations per sperm in a 20-year-old, but at age 40 it is 65 mutations. By 56, it doubles again. The effect is very visible - someone born to a father of 22 is already 5-10 per cent more attractive than those with a 40-year-old father and the difference grows with the age gap. In contrast, women pass on a maximum of 15 mutations to their baby, regardless of age, according to the study published in the journal Nature. Surveying a group of six men and six women, researchers showed them each 4,018 photographs of 18-20-year-old men and 4,416 of women the same age, and asked to assess their attractiveness. Those with older fathers were consistently considered less attractive. However, the children of older men, though less attractive, are likely to outlive their peers with younger fathers, it is claimed. Professor Lee Smith, a geneticist at Edinburgh University, told the Sunday Times other research found such children have longer telomeres - the caps on the end of chromosomes --- which are associated with longer life. But the mounting research connecting parents' age with autism is cause for concern, experts warn. Autism is an umbrella term for a range of developmental disorders that have a lifelong effect on someone's ability to interact socially and communicate openly. In the UK, around one in 100 adults is thought to be affected by autism, mostly men, caused by a combination of genetic and environmental factors. Researchers said men should be advised about the potential problems in order to help their personal decision-making when it came to having fathering children at older ages. They warned that advancing paternal age faced a risk of 'numerous public health and societal problems'. Among well-known older dads are Simon Cowell, 54, whose son was born earlier this month, and comedian Frank Skinner whose first child was born in 2012 when he was 55.
Answer: When a man becomes older, sperm-producing cells copy his DNA less effectively

A: From the passage, we know that _ .
****
Q: Article: Mountaineers have noted that as they climb, for example, up to the 12,633foot Humphreys Peak in Arizona, plant life changes greatly. In the Sonoran Desert, one climbs into a pine forest at 7,000 feet and a treeless tundra on the top of the mountain. It may seem that plants at a given altitude are associated in what can be called "communities" -groupings of species. The idea is that over time, plants that require particular climate and soil conditions come to live in the same places, and are frequently to be found together. Scientists study the history of plant life and build up a picture of how groups of plants have responded to climate changes and how ecosystems develop. But are these associations, _ are real in the present, permanent? A great natural experiment took place on this planet between 25,000 and 10,000 years ago, when small changes in the earth's orbit caused great sheets of ice to spread from poles. These glaciers covered much of North America and Europe to depths of up to two miles, and then, as the climate warmed, they retreated. During this retreat, they left behind newly uncovered land for living things to occupy, and as those living things moved in they laid down a record we can read now. As the ice retreated and plants started to grow near a lake, they release pollen . Some would fall into the lake, sink to the bottom and mix with the sand. By drilling into the lake bottom it is possible to read the record of the plant life around the lake. The fossil record seems clear; there is little or no evidence that entire groups of plants moved north together. Things that lived together in the past don't live together now, and things that live together now didn't live together in the past. Each individual living things moved at its own pace. The fossil record seems to be telling us that we should be thinking about preserving species by giving them room to move about-to respond to environmental changes.
Answer: depends upon climate and soil conditions

A:
According to the passage, the movement of individual species of plants _ .
****