Symmetry in biology refers to the symmetry observed in organisms, including plants, animals, fungi, and bacteria. External symmetry can be easily seen by just looking at an organism. For example, take the face of a human being which has a plane of symmetry down its centre, or a pine cone with a clear symmetrical spiral pattern. Internal features can also show symmetry, for example the tubes in the human body (responsible for transporting gases, nutrients, and waste products) which are cylindrical and have several planes of symmetry. Biological symmetry can be thought of as a balanced distribution of duplicate body parts or shapes within the body of an organism. Importantly, unlike in mathematics, symmetry in biology is always approximate. For example, plant leaves – while considered symmetrical – rarely match up exactly when folded in half. Symmetry is one class of patterns in nature whereby there is near-repetition of the pattern element, either by reflection or rotation. While sponges and placozoans represent two groups of animals which do not show any symmetry (i.e. are asymmetrical), the body plans of most multicellular organisms exhibit, and are defined by, some form of symmetry. There are only a few types of symmetry which are possible in body plans. These are radial (cylindrical), bilateral, biradial and spherical symmetry. While the classification of viruses as an "organism" remains controversial, viruses also contain icosahedral symmetry. The importance of symmetry is illustrated by the fact that groups of animals have traditionally been defined by this feature in taxonomic groupings. The Radiata, animals with radial symmetry, formed one of the four branches of Georges Cuvier's classification of the animal kingdom. Meanwhile, Bilateria is a taxonomic grouping still used today to represent organisms with embryonic bilateral symmetry. (Wikipedia).
http://www.teachastronomy.com/ A lot of fundamental concepts in physics are based on the idea of symmetry. Symmetry is familiar to us in an aesthetic sense. It often means things that have pleasing proportion, or look the same from every direction, or have a harmonious nature about them.
From playlist 23. The Big Bang, Inflation, and General Cosmology 2
This video was produced by Nina Qiu of Year 10 (2015).
From playlist Random
Symmetry in Physics | Noether's theorem
▶ Topics ◀ Global / Local Symmetries, Continuous / Discrete Symmetries ▶ Social Media ◀ [Instagram] @prettymuchvideo ▶ Music ◀ TheFatRat - Fly Away feat. Anjulie https://open.spotify.com/track/1DfFHyrenAJbqsLcpRiOD9 If you want to help us get rid of ads on YouTube, you can support us on
From playlist Symmetry
The science of symmetry - Colm Kelleher
View full lesson: http://ed.ted.com/lessons/the-science-of-symmetry-colm-kelleher When you hear the word symmetry, you might think generally of triangles, butterflies, or even ballerinas. But defined scientifically, symmetry is "a transformation that leaves an object unchanged." Huh? Colm
From playlist New TED-Ed Originals
The Predictive Power Of Symmetry
From a bee’s hexagonal honeycomb to the elliptical paths of planets, symmetry has long been recognized as a vital quality of nature. Einstein saw symmetry hidden in the fabric of space and time. The brilliant Emmy Noether proved that symmetry is the mathematical flower of deeply rooted phy
From playlist Science Shorts and Explainers
Richard Feynman - The Character of Physical Law - Part4 Symmetry in Physical Law (full version)
Richard Feynman The Character of Physical Law Part4 Symmetry in Physical Law full version
From playlist Feynman's Lectures
Symmetries show up everywhere in physics. But what is a symmetry? While the symmetries of shapes can be interesting, a lot of times, we are more interested in symmetries of space or symmetries of spacetime. To describe these, we need to build "invariants" which give a mathematical represen
From playlist Relativity
Bronwyn Hajek: Shock Me Amadeus
Associate Professor Bronwyn Hajek, applied mathematician at the University of South Australia, is an expert in developing and solving mathematical models using nonlinear PDEs. During her upcoming SMRI visit, Hajek and her USyd collaborator Dr Robby Marangell will apply Lie symmetry method
From playlist SMRI Interviews
Teach Astronomy - Broken Symmetry
http://www.teachastronomy.com/ It's a premise of unified theories of nature that the world is governed by an underlying single superforce, but we live in a world where the symmetry is not obvious. Matter vastly dominates antimatter, and the four forces of nature have vastly different stre
From playlist 24. Chemistry and Context for Life
The science of symmetry | The Royal Society
From movies, art and architecture to the fundamental rules of life and the Universe around us, symmetry is everywhere. 🌌 Subscribe to our channel for exciting science videos and live events, many hosted by Brian Cox, our Professor for Public Engagement: https://bit.ly/3fQIFXB #symmetry #b
From playlist Inspiring science
Stanford Seminar - Lenia: Biology of Artificial Life, Bert Wang-Chak Chan
Bert Wang-Chak Chan January 15, 2020 In the field of Artificial Life, we use biochemistry, engineering and computer simulation to answer "what is life" and "what life could be". Starting from Conway's Game of Life, a famous discrete cell simulation, we tried to make everything smooth and
From playlist Stanford EE380-Colloquium on Computer Systems - Seminar Series
Alejandro Villaverde, Universidade de Vigo
April 19, Alejandro Villaverde, Universidade de Vigo The role of symmetries in biological dynamics: identification vs adaptation
From playlist Spring 2022 Online Kolchin seminar in Differential Algebra
Active processes in cells and tissues (Lecture 1) by Frank Jülicher
INFOSYS-ICTS TURING LECTURES ACTIVE PROCESSES IN CELLS AND TISSUES SPEAKER: Frank Jülicher (Max Planck Institute for the Physics of Complex Systems, Dresden, Germany) DATE: 09 December 2019, 16:00 to 17:30 VENUE: Ramanujan Lecture Hall, ICTS-TIFR, Bengaluru Living matter is highly dyn
From playlist Infosys-ICTS Turing Lectures
Philip Kurian: "New horizons in quantum biology: Learning complexity, emergence, and coherence..."
Machine Learning for Physics and the Physics of Learning 2019 Workshop I: From Passive to Active: Generative and Reinforcement Learning with Physics "New horizons in quantum biology: Learning complexity, emergence, and coherence in living matter" Philip Kurian, Howard University Institut
From playlist Machine Learning for Physics and the Physics of Learning 2019
The Physics of Morphogenesis (Part 2) by Erez Braun
Discussion Meeting Thirsting for Theoretical Biology (ONLINE) ORGANIZERS: Vaishnavi Ananthanarayanan (UNSW & EMBL Australia), Vijaykumar Krishnamurthy (ICTS-TIFR, India) and Vidyanand Nanjundiah (Centre for Human Genetics, India) DATE: 11 January 2021 to 22 January 2021 VENUE: Online
From playlist Thirsting for Theoretical Biology (Online)
Quadratic Graphs - Part 2 | Graphs | Maths | FuseSchool
CREDITS Animation & Design: Jean-Pierre Louw (https://www.behance.net/Jean-Pierre_Louw) Narration: Lucy Billings Script: Lucy Billings In this video we are going to discover even more information connecting the quadratic equation with it’s graphed function. We will look at the turning poi
From playlist MATHS
The physics of virus self-assembly by Vinothan N. Manoharan
COLLOQUIUM : THE PHYSICS OF VIRUS SELF-ASSEMBLY SPEAKER : Vinothan N. Manoharan (Harvard University, US) DATE : 05 April 2021 VENUE : Online Colloquium ABSTRACT Simple viruses consist of RNA and proteins that form a shell (called a capsid) that protects the RNA. The capsid is highly
From playlist ICTS Colloquia