大进化

Key research topics related to re-establishment of sculpin species include comparing spawning ecology and early life history of each species, determining population structure, and evaluating the feasibility of live-transfer methods.

群落和生态系统水平相互影响的关键研究题目包括了解群落功能的大尺度方向性的影响，拓展目前广泛接受的大湖生态演替观点，并且决定深水鱼类依日周期在垂直方向上迁移的进化角色。

You can find many beautiful marine animals in the dark and green sea.

在深绿色的大海里你还能发现许多美丽的海洋动物，这是个集科研和探寻岛上生命进化为一体的地方。

They will be as different form us as we are from a single-celled organism, because this is as much time between now and the death of the Sun as that has been for the entire course of biological evolution.

他们与我们的区别就如同我们与单细胞生命体的区别一样大，因为从现在到太阳死亡与整个生物进化的历史一样长。

That means big birds have to evolve different molting patterns to deal with their slowpoke feathers .

这意味着体积大的鸟为了应对自己老化的羽毛，必须进化出不同的换羽方式。

Although the fittest possible stickleback might be both slender and wide-mouthed, these linked traits make such an evolutionary jump unlikely.

虽然可能最适应环境的棘鱼既苗条又有大嘴，这些相连的特征导致了这种不利的突变的进化结果。

It is a member of the white pine group, Pinus subgenus Strobus, and like all members of that group, the leaves are in fascicles of five, with a deciduous sheath.

红松是平凡朴实的树种，在漫长的生命进化过程中，虽然没有产生太大的变化和演绎出拍案叫绝的精彩故事，但它始终朝气蓬勃、郁郁葱葱。

Thermonuclear massive stars reflect only for a few million years, the evolution of life is far from sufficient.

大质量恒星的热核反映只能维持几百万年，这对于生命进化来说是远远不够的。

The rest clones were quite different and were most related with uncultured sequences, forming special division in the tree.

其余的克隆为未培养序列，与前者差异很大，在进化树上形成了独立的分支。

The 4 nucleotides of DNA sequences can be further encoded with two - bit digits in which t he first bit is the base bit to encode purines and pyrimidines and the second bit is the functional group bit to encode the keto group and amino group. According to the degree of degeneracy of genetic codes and the two dimension distribution of molecular weights and isoelectricpoints of amino acids , a set of classification graph(Venn' s diagram) of amino acids can be obtained. It is suggested that the amino acids of high degenerate group are mostly small and simple, and constitute the transmembranic structure or the structural domains of protein molecules. So amino acids of high degenerate group might appear in the early evolution stage.

根据氨基酸遗传密码子的简并程度并以分子量及等电点作为氨基酸的化学特性坐标，作出其二维集合MP分类图，根据氨基酸的分类分析，可以认为：高简并度氨基酸多数是脂烃类和羟脂烃类的氨基酸，分子量比较小，分子结构比较简单，大部分为疏水性，主要组成跨膜结构或蛋白质的结构域，可能是出现较早的氨基酸；而低简并度的氨基酸，分子结构比较复杂，分子量比较大，多数是和蛋白质功能有密切联系的基团，可能是进化出现较晚的结构。

In the phylogenetic tree, the cattle and zebu were clustered together first, followed by the yak, buffalo, pig, human, mouse, and rat.

HSL基因外显子Ⅰ部分核苷酸序列进行多序列对位排列构建的各物种间分子系统进化树结果表明，普通牛和瘤牛首先聚为一类，再分别与牦牛、水牛、猪、人聚类，最后与大鼠、小鼠聚为一类。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。