查询词典 sticklebacks

The three-spined sticklebacks, freshwater fishes, that have been studied by Dolph Schluter who received his Ph.D.

在英属哥伦比亚省的道尔夫·斯克鲁特和他目前的同事们研究了淡水三刺鱼，提供了一个可以用同域物种形成来最好地解释的有趣的例子。

Over an estimated 10,000 generations, the sticklebacks show structural differences that are greater than those seen between different genera of fish including variations in fins, changes in the number or size of their bony plates, variable jaw structure, and color differences.

估计已经有10000世代了，三刺鱼表现出的结构性差异大于我们看到的不同属的鱼类之间的差异，包括鳍的不同，骨板的数量或大小出现变化，可变的颌骨结构以及颜色的差异。

Researchers expected that the gene responsible would vary from lake to lake. Instead, they found that each group of stranded sticklebacks had lost its armor by the same mechanism: a rare DNA defect affecting a signaling molecule involved in the development of dermal bones and teeth. That single preexisting variant--rare in the open ocean--allowed the fish to adapt rapidly to a new environment.

研究者希望不同的湖之间相关的基因有所差别，可是，他们发现每一组搁浅的棘鱼都通过同样的机制失去了它们的装甲：一种罕见的DNA缺陷影响了一个涉及皮内骨和牙齿生长的信号分子，这一个先前存在的变数——在开放的海洋中很少存在——使得鱼可以迅速适应新的环境。

Bilbo: Sticklebacks!

比尔博：真是恼人！

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。