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Functionalism01:11

Functionalism

529
William James, John Dewey, and Charles Sanders Peirce were instrumental in founding functional psychology, which draws heavily from Darwin's theory of evolution by natural selection. This theory suggests that individual traits, including behaviors, are adapted to their environments through natural selection. At the heart of functionalism is the concept of adaptation, meaning that a trait enhances an individual's chances of survival and reproduction.
James envisioned psychology's...
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Naming Skeletal Muscles01:19

Naming Skeletal Muscles

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The naming of the approximately 700 muscles in the human body is based on a set of criteria designed to provide descriptive information about each muscle, making it easier to identify and remember them.
The key factors used in naming muscles include:
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Convergent Evolution01:54

Convergent Evolution

27.7K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
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Directional Terms01:14

Directional Terms

8.5K
Directional terms are essential for describing the relative locations of different body structures. For instance, an anatomist might describe one band of tissue as "inferior to" another, or a physician might describe a tumor as "superficial to" a deeper body structure. These terms often use comparative terms in pairs to trace out the relative locations of one body part to another or descriptions of body tissues like the deeper ones from superficially present with reference to...
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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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Export of Mitochondrial and Chloroplast Genes02:19

Export of Mitochondrial and Chloroplast Genes

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A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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起源 で は なく 機能 が 重要 な 時

Yvonne M Buckley1, Andrew Torsney2

  • 1Co-Centre for Climate + Biodiversity and Water, School of Natural Sciences, Trinity College Dublin, Dublin 2, Ireland.

Science (New York, N.Y.)
|February 1, 2024
PubMed
まとめ
この要約は機械生成です。

植物の多様性や豊富さに似た影響を及ぼしている. この研究は,大きな草食動物が,その起源に関係なく,植物社会に及ぼす生態学的影響を強調しています.

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Why Quantification Matters: Characterization of Phenotypes at the Drosophila Larval Neuromuscular Junction
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Why Quantification Matters: Characterization of Phenotypes at the Drosophila Larval Neuromuscular Junction

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関連する実験動画

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科学分野:

  • エコロジー
  • 植物学
  • 動物学

背景:

  • 巨大草食動物は 生態系を形作る上で重要な役割を果たします
  • 保護と生態系管理には 本来のメガハービョーバーと 導入されたメガハービョーバーの影響を 理解することが不可欠です

研究 の 目的:

  • 植物の多様性や豊富さに対する本来のメガハービオアの影響を比較する.
  • メガハービオアの起源が 植物社会に与える生態的影響を 評価する.

主な方法:

  • 現地での観察と植生調査は,原生および導入された大草食動物集団の地域で行われました.
  • 植物の多様性と豊富さを量化し,統計的に分析した.

主要な成果:

  • 植物の多様性や豊富さには 地元のメガハービョーバーも 導入されたメガハービョーバーも 大きく影響した.
  • これらの効果の大きさと方向性において,原生群と導入された大草食群の間の有意な違いは見つかりませんでした.

結論:

  • メガハービオアの起源は植物社会への影響を決定する主な要因には見えない.
  • 保護と管理の戦略は,メガハービベアの生態学的役割に重点を置くべきであり,単にその原生または導入された状態に重点を置くべきではない.