Bevis för evolution

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Innehåll:
00:00 Introduktion. Hur kan man tala om "bevis för evolution"?
01:00 Fossil
01:24 Fossilbildning
02:11 Några klassiska fossiltyper
02:59 Ledfossil
04:06 Hur stratigrafi och ledfossil hänger samman
07:16 Radiometriska metoder för åldersbestämning
08:00 Den fylogenetiska regeln
08:47 Likheter i anatomin: Homolog och analoga organ
10:01 Likheter i DNA och protein
11:11 Likheter i beteende
11:30 Rudiment
12:31 Felande länkar
13:04 Hästens evolution
Bildkällor:
• Trilobit: commons.wikimedia.org/wiki/Fi..., attribution: By TheoricienQuantique (Own work) [Public domain], via Wikimedia Commons
• Ortoceratit-fossil: Egen bild
• Ortoceratit: commons.wikimedia.org/wiki/Fi..., attribution: By Nobu Tamura (spinops.blogspot.com) (Own work) [GFDL (www.gnu.org/copyleft/fdl.html) or CC BY 3.0 (creativecommons.org/licenses/b...)], via Wikimedia Commons
• Dinosaurie-fotspår: commons.wikimedia.org/wiki/Fi..., attribution: By Greg Willis from Denver, CO, usa (Dinosaur footprint) [CC BY-SA 2.0 (creativecommons.org/licenses/b...)], via Wikimedia Commons
• Grand Canyon: commons.wikimedia.org/wiki/Fi..., attribution: By Chensiyuan (Own work) [GFDL (www.gnu.org/copyleft/fdl.html) or CC BY-SA 4.0-3.0-2.5-2.0-1.0 (creativecommons.org/licenses/b...)], via Wikimedia Commons
• Örnklippan: commons.wikimedia.org/wiki/Fi..., attribution: By Julius Reque (Traveling12Feet.com) [CC BY-SA 3.0 (creativecommons.org/licenses/b...)], via Wikimedia Commons
• Dunkleosteus: commons.wikimedia.org/wiki/Fi..., attribution: By Creator:Dmitry Bogdanov ([e-mail]) [GFDL (www.gnu.org/copyleft/fdl.html) or CC BY 3.0 (creativecommons.org/licenses/b...)], via Wikimedia Commons
• Tiktaalik: commons.wikimedia.org/wiki/Fi..., attribution: By Obsidian Soul [CC BY-SA 3.0 (creativecommons.org/licenses/b...)], via Wikimedia Commons
• Dimetrodon: commons.wikimedia.org/wiki/Fi..., attribution: By Богданов [e-mail] (Own work) [Public domain], via Wikimedia Commons
• Tyrannosaurus rex: commons.wikimedia.org/wiki/Fi..., attribution: By Nobu Tamura (spinops.blogspot.com) (Own work) [GFDL (www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (creativecommons.org/licenses/b...) or CC BY 2.5 (creativecommons.org/licenses/b...)], via Wikimedia Commons
• Ammoniter: commons.wikimedia.org/wiki/Fi..., attribution: By Takkk (Own work) [CC BY-SA 3.0 (creativecommons.org/licenses/b...) or GFDL (www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons
• Den fylogenetiska regeln: commons.wikimedia.org/wiki/Fi..., attribution: By Lithograph by J. G. Bach of Leipzig after drawings by Haeckel, from Anthropogenie published by Engelmann [Public domain], via Wikimedia Commons
• Homologa strukturer: commons.wikimedia.org/wiki/Fi..., av Mehinger, CC BY-SA 4.0 (creativecommons.org/licenses/..., via Wikimedia Commons
• Likheter i beteende: Image from: Gross L. Evolution of neonatal imitation. PLoS Biol. 2006 Sep;4(9):e311. doi: 10.1371/journal.pbio.0040311 and neuroscientificallychallenged... (Fair use)
• Skelett av bardval: commons.wikimedia.org/wiki/Fi..., attribution: By Meyers Konversionlexikon (Meyers Konversionlexikon 1888) [Public domain or Public domain], via Wikimedia Commons
• Hästens evolution: commons.wikimedia.org/wiki/Fi..., attribution: Mcy jerry at the English language Wikipedia [GFDL (www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (creativecommons.org/licenses/b...)], from Wikimedia Commons

[@bigchungus9187]

Ska se till att visa den här för vår andra vice talman... jättebra video!

[@MagnusEhinger01]

Haha, tack! Gör det! 😉

[@andrewbrandtmbgy9082]

Kan inte tro att den komiskt stora kaninen big chungus ska visa bevis för evolution till sin andra vice talman

[@gabsgamez546]

🎯 Key Takeaways for quick navigation:
00:01 🧭 *Evolutionary Basics*
- Overview of the scientific method in biology.
- Emphasis on the importance of starting with data and drawing conclusions.
- Introduction to the focus on "evidence for evolution" through collected data.
01:00 🦴 *Formation of Fossils*
- Explanation of fossils as petrified remains of organisms.
- Detailed process of fossilization using the example of a fish.
- Examples of classic fossils like trilobites, orthoceratites, and dinosaur footprints.
03:06 🏞️ *Stratigraphy and Led Fossils*
- Introduction to stratigraphy and its role in dating fossils.
- Explanation of how led fossils help determine the age of other fossils.
- Illustration using the example of Grand Canyon layers and the principle of "stratigraphy + led fossils = truth."
05:24 🌐 *Evolutionary Progression in Fossil Record*
- Description of fossil progression in Grand Canyon layers.
- Presentation of different vertebrate groups and their appearance in the fossil record.
- Emphasis on the principle that fossilized organisms are tied to specific layers, indicating simultaneous existence and evolution.
06:51 🔍 *Characteristics of Led Fossils*
- Criteria for effective led fossils: rapid evolution, wide geographic distribution, ease of identification.
- Examples of led fossils, including trilobites and ammonites.
- Importance of led fossils in dating and understanding geological history.
07:43 ⚛️ *Radiometric Dating*
- Explanation of radiometric dating using radioactive isotopes.
- How the decay of isotopes helps determine the age of fossils and rocks.
- Importance of using multiple methods for accurate dating.
08:13 🧬 *Phylogenetic Rule*
- Discussion of the phylogenetic rule in embryonic development.
- Illustration of homologous structures and their significance.
- Examples of how homologous structures indicate evolutionary relationships.
09:38 🧠 *DNA and Protein Similarities*
- Explanation of DNA and protein similarities as evidence for evolution.
- Demonstration of how DNA and amino acid sequences show relatedness.
- Importance of genetic similarity in determining evolutionary relationships.
11:22 🦍 *Behavioral and Rudimentary Evidence*
- Overview of behavioral similarities in closely related species.
- Introduction to rudiments as evolutionary remnants.
- Example of rudimentary structures in whales as evidence of their land-dwelling ancestors.
12:19 🦴 *Rudimentary Organs*
- Explanation of rudimentary organs, such as skeletal remnants in whales.
- Examples of rudiments in different species, like tailbones, blind mammal eyes, and ear muscles in primates.
- Rudimentary structures may have reduced or lost functions over evolutionary time.
13:48 🔄 *Missing Links and Horse Evolution*
- Introduction to the concept of missing links in the evolutionary chain.
- Discussion of the horse's evolution as a notable example.
- Explanation of environmental changes driving evolutionary adaptations in horses over millions of years.
14:36 🌿 *Evolutionary Adaptation*
- Overview of the horse's transition from forest-dwelling leaf and fruit-eater to grass-eater on the steppe.
- Importance of environmental changes in shaping evolution.
- Emphasis on the role of fitness in driving evolutionary adaptations.
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[@isakberisha2242]

Jag har träffat en elev av dig Moreia

[@MagnusEhinger01]

Minsann, du får hälsa henne så gott! 😊