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People have grown taller over the last century, with South Korean women shooting up by more than 20cm on average, and Iranian me

admin2021-01-06  30
问题    People have grown taller over the last century, with South Korean women shooting up by more than 20cm on average, and Iranian men gaining 16.5cm. A global study looked at the average height of 18-year-olds in 200 countries between 1914 and 2014.
   The results reveal that while Swedes were the tallest people in the world in 1914, Dutch men have risen from 12th place to claim top spot with an average height of 182. 5cm. Latvian women, meanwhile, rose from 28th place in 1914 to become the tallest in the world a century later, with an average height of 169.8cm.
   James Bentham, a co-author of the research from Imperial College, London, says the global trend is likely to be due primarily to improvements in nutrition and healthcare. " An individual’s genetics has a big influence on their height, but once you average over whole populations, genetics plays a less key role," he added.
   A little extra height brings a number of advantages, says Elio Riboli of Imperial College. "Being taller is associated with longer life expectancy," he said. "This is largely due to a lower risk of dying of cardiovascular (心血管的) disease among taller people. "
   But while height has increased around the world, the trend in many countries of north and sub-Saharan Africa causes concern, says Riboli. While height increased in Uganda and Niger during the early 20th century, the trend has reversed in recent years, with height decreasing among 18-year-olds.
   "One reason for these decreases in height is the economic situation in the 1980s," said Alexander Moradi of the University of Sussex. The nutritional and health crises that followed the policy of structural adjustment, he says, led to many children and teenagers failing to reach their full potential in terms of height.
   Bentham believes the global trend of increasing height has important implications. "How tall we are now is strongly influenced by the environment we grew up in," he said. " If we give children the best possible start in life now, they will be healthier and more productive for decades to come. "
What does James Bentham say about genetics in the increase of people’s height?
选项 A、It counts less than generally thought.
B、It outweighs nutrition and healthcare.
C、It impacts more on an individual than on a population.
D、It plays a more significant role in females than in males.
答案C
解析 推理判断题。文章第三段第二句提到伦敦帝国理工学院的詹姆斯·边沁认为，个体的基因对其身高有很大影响，但一旦平均到整体人口，基因的作用就不那么重要了。由此可知，基因对个体的影响大于对整体人口的影响，故答案为C)。
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