Theroy of Evolution
Published on Nov 18, 2015
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PRESENTATION OUTLINE
Darwin's contributaion to science
- Developed a theory of evolution
- The theory offered incite to constantly changing world
- Helps understand modern sickness
-The theory of evolution that explains how modern organisms evolved over long periods of time through decent from common ancestors.
-Helps us understand drug-resistant bacteria and new diseases.
-Helps us understand drug-resistant bacteria and new diseases.
Photo by kevin dooley
Charles darwin
- Born in 1809
- His joureny was when he discoverd evolution
-Born February 12, 1809 in England.
-He collected bugs as a kid and studied them
-His journey began in 1831
-He collected bugs as a kid and studied them
-His journey began in 1831
Photo by lofaesofa
What he's given credit for
- Discovery evolution
- Developing scientific theory of biological evolution
- Studying species on Galàpagos
-Scientific theory of biology evolution that explains how modern organisms evolved over long periods of time through decent from common ancestors.
Photo by r.j.wagner
The VOYAGE
- Started 1831
- Visited many continents
- There journey started with another objective
-started in 1831 and was a 5 year long trip.
-Went to South America, Australia and Africa.
-They originally were meant to map the coastline of South America.
-Went to South America, Australia and Africa.
-They originally were meant to map the coastline of South America.
OBSERVATION from Voyage
- Species vary globally
- Species vary locally
- Species vary over time
-Species vary globally: different yet ecologically similar, animal species inhabited separated but similar habitats around the globe.
-Species vary locally: Different yet related animal species often occupied different habitats within local area.
-Species vary over time: Collected fossils of extinct animals were similar to living species.
-Species vary locally: Different yet related animal species often occupied different habitats within local area.
-Species vary over time: Collected fossils of extinct animals were similar to living species.
Photo by Memories_keepers (changed)
Process of Natural Selection
- Process of living organisms
- Enviroment can cause a specied to change
- Adaptation
- Fitness
- Survivle of the Fitess
-Process by which organisms survive and leave more offspring.
-Occurs in any situation in which more individuals are born than can survive, there is natural heritable variation and there is variable fitness among individuals.
-Adaptation is any heritable characteristic that increase an organism's ability to survive and reproduce in its environment.
-Fitness describes how well organism can survive and reproduce in its environment.
-Survivle of the fitess is staying alive and reproduing and passing off adaptations to offspring
-Occurs in any situation in which more individuals are born than can survive, there is natural heritable variation and there is variable fitness among individuals.
-Adaptation is any heritable characteristic that increase an organism's ability to survive and reproduce in its environment.
-Fitness describes how well organism can survive and reproduce in its environment.
-Survivle of the fitess is staying alive and reproduing and passing off adaptations to offspring
Photo by eastfallsglass
Evidence that supports evolution
- Fossils
- Common ancestors
- DNA structures
- Vestigial, Homologus and Analogous Structures
-Many recent discovered fossils form series that trace the evolution of modern species from extinct ancestors
-All species are descended from ancient common ancestors.
-Over many generations, adaptation could cause successful species to evolve onto new species.
-DNA evidence shows species can be related to each other even if their bodies don't show evidence.
-Vestigial: inherited from ancestor but lost much or all of their original function.
-Analogous: Body parts that share common
-Homologous: structures shared by related species and that have been inherited from common ancestors.
-All species are descended from ancient common ancestors.
-Over many generations, adaptation could cause successful species to evolve onto new species.
-DNA evidence shows species can be related to each other even if their bodies don't show evidence.
-Vestigial: inherited from ancestor but lost much or all of their original function.
-Analogous: Body parts that share common
-Homologous: structures shared by related species and that have been inherited from common ancestors.
Photo by hermitsmoores
enivromental effects on species of time
- Climate changes
- Volcanoes
- Continental drift
-The Ice age cause species to evolve to live in the cold.
-Volcanoes provide islands for new habitats.
-The continental drift caused similar species to evolve differently based on where they were.
-Volcanoes provide islands for new habitats.
-The continental drift caused similar species to evolve differently based on where they were.
Photo by WideAngleWandering
Types of selection
- Directional Selection
- Stabilizing Selection
- Distruptive selection
-Directional selection: when individuals at one end of the cure have higher fitness than the ones in the middle.
-Stabilizing Selection: individuals near the center of the curve that have higher fitness than ones at the end.
-Disruptive Selection: individuals at the ends that have higher fitness than the ones in the middle
-Stabilizing Selection: individuals near the center of the curve that have higher fitness than ones at the end.
-Disruptive Selection: individuals at the ends that have higher fitness than the ones in the middle
SCIENTISTS who also contributed
- Hutton
- Lyell
- Malthus
- Lamark
-Hutton-published Theory of the Earth a founding text of modern geology. He argued the world is older than 6000 years and the earth's surface is under constant evolution.
-Lyell: believed change was a gradual process that occurred over long periods of time at constant rate. Rejected the idea a catastrophe evolutionized the Earth.
-Malthus: Noticed humans were born faster than they died which lead to overpopulation. Darwin saw this theory in all living organisms.
-Lamark: Believed that changes in environment caused changed in behavior that lead to evolution.
-Lyell: believed change was a gradual process that occurred over long periods of time at constant rate. Rejected the idea a catastrophe evolutionized the Earth.
-Malthus: Noticed humans were born faster than they died which lead to overpopulation. Darwin saw this theory in all living organisms.
-Lamark: Believed that changes in environment caused changed in behavior that lead to evolution.
Photo by dbr Atl
