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関連する概念動画

Morphogenesis02:19

Morphogenesis

Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
Constraints and Statical Determinacy01:26

Constraints and Statical Determinacy

In structural engineering, the equilibrium of a system is not only determined by its equations of equilibrium but also with the help of constraints. Constraints refer to restrictions on the motion of a system. The proper combinations of constraints can minimize the total number of constraints needed to maintain a system in mechanical equilibrium. When this happens, the system is said to be statically determinate. For such systems, the unknown reaction supports can be estimated using equilibrium...
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
Structuralism01:26

Structuralism

Structuralism, an early psychological theory developed by Wilhelm Wundt and his student Edward Bradford Titchener, sought to dissect the human mind into its most fundamental components. Wundt's groundbreaking work in his laboratory set the stage for Titchener to define structuralism's goal as cataloging the "atoms" of the mind—sensations, images, and feelings—akin to how chemists identify elements of matter.
Titchener's approach to structuralism was unique. He employed introspection, a method...
Evolutionary Psychology01:20

Evolutionary Psychology

Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...
Revisionist Views of Adolescent and Adult Cognition01:24

Revisionist Views of Adolescent and Adult Cognition

A revisionist approach to Jean Piaget's theory of cognitive development has brought new insights that challenge and reinterpret his established ideas. Piaget proposed that the formal operational stage, emerging in adolescence, represents the culmination of cognitive maturity. During this stage, individuals are said to develop abstract thinking, engage in systematic problem-solving, and show a form of egocentrism, believing others are as preoccupied with their behavior as they are themselves.

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関連する実験動画

Updated: Jun 10, 2026

Analysis of the Development of a Morphological Phenotype as a Function of Protein Concentration in Budding Yeast
15:02

Analysis of the Development of a Morphological Phenotype as a Function of Protein Concentration in Budding Yeast

Published on: March 24, 2010

発達上の制約と形態学的進化における柔軟性との対比.

Patricia Beldade1, Kees Koops, Paul M Brakefield

  • 1Institute of Evolutionary and Ecological Sciences, Leiden University, PO Box 9516, 2300 RA Leiden, The Netherlands. pbeldade@rulsfb.leidenuniv.nl

Nature
|April 27, 2002
PubMed
まとめ

進化的発達生物学は,どのように発達が進化的変化に影響を与えるかを探求する. この研究は,蝶の翼のパターンが独立して変化することを示し,発達上の制約ではなく自然選択が多様性を駆動することを示唆しています.

科学分野:

  • 進化的発達生物学 進化的発達生物学
  • エボ・デボ (Evo-Devo) とは
  • 動物の形態学 動物の形態学

背景:

  • 進化的発達生物学では,自然選択による多様性の分類から,進化による多様性の生産へと焦点を移す.
  • 発達メカニズムは,進化の軌道をバイアスさせ,潜在的に静止状態を引き起こしたり,形態学的進化を制限したりすることができます.
  • 形態学の進化的制約に対する経験的証拠は,広範な理論的議論にもかかわらず,稀である.

研究 の 目的:

  • 蝶の翼のパターンの形成における,発達上の制約と自然選択の役割を調査する.
  • 連続的に繰り返される要素,例えばアイスポットは,独立して進化するか,または発達的に結合しているかどうかをテストする.
  • 蝶の翼のパターンにおける形態学的進化の柔軟性に関する経験的データを提供すること.

主な方法:

  • 蝶種Bicyclus anynanaを研究し,その多様な翼のパターンで知られています.
  • 翼の複数のアイスポット間の発達関係を調べました.
  • 連続的に繰り返される翼パターンの要素における独立した進化的変化の可能性を評価した.

主要な成果:

  • Bicyclus anynanaのアイスポット間の発達的なカップリングにもかかわらず,独立した変化の有意な可能性が観察されました.

さらに関連する動画

Creating Objects and Object Categories for Studying Perception and Perceptual Learning
14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Probing the Roles of Physical Forces in Early Chick Embryonic Morphogenesis
06:33

Probing the Roles of Physical Forces in Early Chick Embryonic Morphogenesis

Published on: June 5, 2018

関連する実験動画

Last Updated: Jun 10, 2026

Analysis of the Development of a Morphological Phenotype as a Function of Protein Concentration in Budding Yeast
15:02

Analysis of the Development of a Morphological Phenotype as a Function of Protein Concentration in Budding Yeast

Published on: March 24, 2010

Creating Objects and Object Categories for Studying Perception and Perceptual Learning
14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Probing the Roles of Physical Forces in Early Chick Embryonic Morphogenesis
06:33

Probing the Roles of Physical Forces in Early Chick Embryonic Morphogenesis

Published on: June 5, 2018

  • この発達的な柔軟性は,翼のパターンの実質的な進化的修正を可能にします.
  • この発見は,進化的新奇性を制限する強力な内部発達的制約の概念に異議を唱える.

    • 結論:

    • 蝶の翼パターンの進化は,かなりの柔軟性を発揮し,自然選択の主要な役割を果たしています.
    • 発達経路は,これらの複雑な特徴の多様化に対する主要な制約ではないようです.
    • この研究は,生物多様性の発生における発達バイアスと自然選択の相互作用を強調しています.