史前灭绝植物莱式蕨的模拟图-凯发k8官网

史前灭绝植物莱式蕨的模拟图
文章来源:未知 文章作者:enread 发布时间:2014-04-14 05:52 字体: [ ] 
(单词翻译:双击或拖选)
jeff benca is an admitted über-geek when it comes to 1 plants, so it was no surprise that, when he submitted a paper describing a new species of long-extinct lycopod(石松植物) for publication, he ditched the standard line drawing and insisted on a 2 and beautifully rendered color 3 of the plant. this piece earned the cover of march's centennial(百年纪念) issue of the american journal of botany(植物学). benca described this 400-million-year-old fossil lycopod, leclercqia scolopendra, and created a life-like computer 4. the stem of the lycopod is about 2.5 millimeters across.
 
"typically, when you see pictures of early land plants, they're not that sexy: there is a green forking stick and that's about it. we don't have many thorough 5," said benca, a graduate student in the department of integrative biology and museum of paleontology at uc berkeley. "i wanted to give an impression of what they may have really looked like. there are great color reconstructions of 6, so why not a plant?"
 
benca's realistic, full-color image could be a life portrait, except for the fact that it was 7 from a plant that lay 8 and compressed into rock for more than 375 million years.
 
called leclercqia scolopendra, or centipede clubmoss, the plant lived during the "age of fishes," the devonian period. at that time, lycopods -- the group leclercqia belonged to -- were one of few plant lineages with leaves. leclercqia shoots were about a quarter-inch in diameter and probably formed prickly, 9, ground-covering mats. the function of leclercqia's hook-like leaf tips is unclear, benca said, but they may have been used to clamber over larger plants. today, lycopods are represented by a group of inconspicuous plants called club 10, quillworts and spikemosses.
 
both living and extinct lycopods have fascinated benca since high school. when he came to uc berkeley last year from the university of washington, he brought a truckload of some 70 different species, now part of collections at the uc botanical garden.
 
now working in the paleobotany lab of cindy looy, berkeley assistant professor of integrative biology, benca continues to establish a growing list of living lycopod species, several of which will eventually be incorporated into the uc and jepson herbaria collections.


点击收听单词发音收听单词发音  

1 spvxq     
adj.(有记载的)历史以前的,史前的,古老的
参考例句:
  • they have found prehistoric remains.他们发现了史前遗迹。
  • it was rather like an exhibition of prehistoric electronic equipment.这儿倒像是在展览古老的电子设备。
2 xunzms     
adj.详细的,详尽的,极注意细节的,完全的
参考例句:
  • he had made a detailed study of the terrain.他对地形作了缜密的研究。
  • a detailed list of our publications is available on request.我们的出版物有一份详细的目录备索。
3 3u6xb     
n.重建,再现,复原
参考例句:
  • the country faces a huge task of national reconstruction following the war.战后,该国面临着重建家园的艰巨任务。
  • in the period of reconstruction,technique decides everything.在重建时期,技术决定一切。
4 ov5xd     
n.表现,描写
参考例句:
  • she gave a splendid rendering of beethoven's piano sonata.她精彩地演奏了贝多芬的钢琴奏鸣曲。
  • his narrative is a super rendering of dialect speech and idiom.他的叙述是方言和土语最成功的运用。
5 b68a36323018dfe7d6624e864a340794     
重建( reconstruction的名词复数 ); 再现; 重建物; 复原物
参考例句:
  • multicolored reconstructions have been formed using (black and white) volume holographic plates. 利用黑白体积全息片已经做成了彩色重建象。
  • the method gives ways to evaluate collision speed in traffic accident reconstructions. 该模型为交通事故再现推算碰撞速度提供了有效实用的方法。
6 87f9c39b9e3f358174d58a584c2727b4     
n.恐龙( dinosaur的名词复数 );守旧落伍的人,过时落后的东西
参考例句:
  • the brontosaurus was one of the largest of all dinosaurs. 雷龙是所有恐龙中最大的一种。 来自《简明英汉词典》
  • dinosaurs have been extinct for millions of years. 恐龙绝种已有几百万年了。 来自《简明英汉词典》
7 muxzii     
v.拖,拉,拔出;adj.憔悴的,紧张的
参考例句:
  • all the characters in the story are drawn from life.故事中的所有人物都取材于生活。
  • her gaze was drawn irresistibly to the scene outside.她的目光禁不住被外面的风景所吸引。
8 1d5d9fedd9ab44a19d9f30a0b81f79a8     
[医](水)平扁的,弄平的
参考例句:
  • she flattened her nose and lips against the window. 她把鼻子和嘴唇紧贴着窗户。
  • i flattened myself against the wall to let them pass. 我身体紧靠着墙让他们通过。
9 cfea7454c3a8813b07de2178a1025138     
v.快速爬行( scramble的现在分词 );攀登;争夺;(军事飞机)紧急起飞
参考例句:
  • scrambling up her hair, she darted out of the house. 她匆忙扎起头发,冲出房去。 来自《现代英汉综合大词典》
  • she is scrambling eggs. 她正在炒蛋。 来自《简明英汉词典》
10 c7366f977619e62b758615914b126fcb     
n. 藓类, 苔藓植物 名词moss的复数形式
参考例句:
  • ferns, mosses and fungi spread by means of spores. 蕨类植物、苔藓和真菌通过孢子传播蔓生。
  • the only plants to be found in antarctica are algae, mosses, and lichens. 在南极洲所发现的植物只有藻类、苔藓和地衣。
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