When you look at yourself in the mirror, do you ever wonder why you look the way you do? No two faces look exactly alike, making a human face as unique as a fingerprint. Genetics(遗传学) obviously play a major role—no two faces share the same DN A. But even in identical twins, ...
根据第二段的句子“A team of evolutionary biologists, led by Viviana Di Pietro, has discovered that these small-brained insects can build in various architectural styles, similar to humans. These styles are passed down from generation to generation, indicating that insects can have cultural ...
Adults may experience chest or abdominal pain, dyspnea or be asymptomatic and the hernia is discovered incidentally for another reason, as in this clinical case. There are a few cases in the literature related with spontaneous pneumothorax. Although it is not clear if pneumothorax causes the ...
Engineered for sustainability The three examples here show that extremely modest engineered changes in plant genetics can result in very important benefits. All three examples involve engineered changes that trigger the natural defenses of the plant. No novel defense mechanisms were introduced in these r...
‘evolutionary throwback’ is controversial. For the better part of a century, most biologists have been reluctant to use those words, mindful of a principle of evolution that says ‘evolution cannot run backwards’. But as more and more examples come to light and modern genetics enters the ...
16. C 下文最后一段有提示“I became a Black Wednesday fan too for a few years"。 17. B discovered意为“发现”;guessed意为“猜测”; thought意为“认为”;predicted意为“预测”。 18. D 由下句“哥哥把那张票给了我”可知他们都买了票 (tickets)。 19. B offered主动提供,从上文看,因为离演出...
根据文章最后一段“Regardless of genetics, their success would not be possible without hard work, dedication, sacrifice, and mental toughness. Their “secret” is simple. Train hard, run fast, and never give up.(抛开遗传因素不谈,如果没有努力、奉献、牺牲和坚强的意志,他们是不可能成功的。他们的...
Genes, chromosomes, and DNA were already well established as crucial elements of the genetics paradigm. Watson, Crick, Franklin, and Wilkins knew the next step was to get the precise structure of DNA. It was February 1953 when a three-dimensional model that looked like a toy finally sat on...
But as more and more examples come to light and modern genetics enters the scene, that principle is having to be rewritten. Not only are evolutionary throwbacks possible, they sometimes play an important role in the forward march of evolution. The technical term for an evolutionary throwback is...
But it turns out that the neural circuit behind the jaw movement most essential to survival—eating—is surprisingly simple, as researchers fromRockefeller Universityrecently described in a new paper inNature. Christin Kosse and other scientists from the Laboratory of Molecular Genetics, headed by J...