查询词典 tetrapods

Or at least any distinct digits in its pectoral fin. But tetrapods, which evolved from fish, did.

但是从鱼类进化来的四足动物却有这种结构。

The development differs from that of tetrapods in that it occurs mainly in the pronephros and only later do chromaffin cells reach the opisthonephric kidney.

开发者不同，它主要是在61%-66%发生及后来做铬到达opisthonephric肾细胞。

On the left, a group of Cheirolepis (primitive ray-finned fishes) is being followed by Eusthenopteron, a large lobe-finned relative of the tetrapods seen in the center.

科学家为我们绘制了精彩的复原图画，在图上离我们最近的位置，一群原始的鱼类正在被一条鳍鱼追逐，它也许是陆生动物的远祖。

The ancestor of all tetrapods four - limbed animals was probably a lobe -finned fish that was similar to coelacanths living today off the Comoro Island's coast .

在非洲科摩罗岛附近的海域，至今仍然生活着一种矛尾鱼，它与被认为是所有四足动物祖先的骨鳞鱼非常相似。

Thus, through phenogenetic drift, the tooth has remained a stable trait in jawed vertebrates, while evolving distinct genetic bases in teleosts and tetrapods.

在遗传表型变迁过程中，有颚脊椎动物的表型保持相对稳定，而硬骨鱼和四脚动物的遗传表型改变明显。

Mation, but it was by no means the only one. As tetrapods ventured onto

鳍转变为四足是一个重要的阶段，但是它并不以为是唯一的转变。

But tetrapods, which evolved from fish, did.

但是从鱼类进化而来的四足动物却有手指。

The newly found species, Tiktaalik roseae, has a skull, a neck, ribs and parts of limbs that are similar to four-legged animals known as tetrapods, as well as fish-like features such as a primitive jaw, fins and scales.

最近发现的种类， Tiktaalik roseae，有一块头骨、一个脖子、与四足动物tetrapods类似的肢体的部分肋骨，以及似鱼功能，例如一个原始下颌、飞翅和鳞状体。

WASHINGTON - Scientists unearthed a skull of the most primitive four-legged creature in Earth's history, which should help them better understand the evolution of fish to advanced animals that walk on land. The 365 million-year-old fossil skull, shoulders and part of the pelvis of the water-dweller, Ventastega curonica, were found in Latvia, researchers report in a study published in Thursday's issue of the journal Nature. Even though Ventastega is likely an evolutionary dead-end, the finding sheds new details on the evolutionary transition from fish to tetrapods. Tetrapods are animals with four limbs and include such descendants as amphibians, birds and mammals.

华盛顿-科学家挖掘出一副地球历史上最原始的四足生物头骨，这个有利于帮组他们更好理解鱼类进化成为更先进的陆地行走生物，这个有着三亿六千五百万年年龄的头骨，肩膀和水生生物的一部分骨盆，Ventastega curonica，在Latvia被发现，研究者一篇研究报告发表在在星期三出版的自然杂志上，尽管Ventastega 可能是一个进化的死胡同，这个发现给出了从鱼类到四足动物进化变迁过程的新细节，四足动物是使用四肢的动物并且包括下属的比如两栖类动物，鸟类和哺乳类动物。

We found that Rhodnius prolixus, a triatomine bug feeding on the blood of various tetrapods and vector of Chagas' disease in humans, carries in its genome four distinct transposon families that also invaded the genomes of a diverse, but overlapping, set of tetrapods.

具体来说，长红锥蝽（一种以四足动物血液为食、是人类锥虫病传播媒介的虫子）的基因组中有四个截然不同的转位子家族，它们入侵包括负鼠和松鼠猴在内的一系列不同四足动物的基因组。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。