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相关概念视频

The Evidence for Evolution02:55

The Evidence for Evolution

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Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
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Phylogenetic Trees03:21

Phylogenetic Trees

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Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
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Phylogeny01:23

Phylogeny

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Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
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The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

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The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
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What is Evolutionary History?02:35

What is Evolutionary History?

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Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
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Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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相关实验视频

Updated: Jun 25, 2025

Resurrection of Dormant Daphnia magna: Protocol and Applications
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纠的银行,编织的河流和复杂的层次结构:超越微观进化和宏观进化.

Maureen Kearney1, Bruce S Lieberman2,3, Luke C Strotz3,4,5

  • 1Division of Environmental Biology, National Science Foundation, Alexandria, VA, United States.

Journal of evolutionary biology
|May 31, 2024
PubMed
概括

微观进化和宏观进化不是不同的领域,而是跨越生物尺度的相互联系的过程. 重新思考这些概念可以促进进化生物学研究中的更大的合成和协作.

关键词:
层次结构的层次结构.宏观演变的发生.微观进化的微观进化古生物学 古生物学 古生物学 古生物学植物动力学学.遗传学系统的遗传学系统.

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相关实验视频

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科学领域:

  • 进化生物学 进化生物学
  • 理论生物学 理论生物学

背景情况:

  • 自现代合成以来,微观进化和宏观进化的关系一直在争论中.
  • 传统观点通常将微观进化和宏观进化视为二进制和减少的.

研究的目的:

  • 根据最近的生物学进步,重新审视微观进化和宏观进化.
  • 提出一个更完整的框架来理解进化过程.

主要方法:

  • 微观进化和宏观进化理论的概念分析.
  • 综合经验数据和进化生物学中的理论进步.
  • 考虑植物动力学和多层次的植物遗传系统.

主要成果:

  • 当前的实证和理论进步挑战了对微观进化和宏观进化的二元观点.
  • 进化模式和过程在各个尺度和层次上相互联系.
  • 生物实体具有模糊的边界,使不同的微观和宏观进化领域复杂化.

结论:

  • 微观进化和宏观进化的传统区别过于简单.
  • 一个多维,多层次的家族遗传系统提供了一个更全面的框架.
  • 整合诸如植物动力学等概念对于推进宏观进化研究至关重要.