LECTURE 2 - Unit 2 Evolution and Natural Selection.pdf - LECTURE 2 Unit 2 Evolution and Natural Selection Sunday 11:18 PM 2.1 History of Evolutionary

LECTURE 2 - Unit 2 Evolution and Natural Selection.pdf -...

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2.1 History of Evolutionary Theory Evolution is NOT a theory - it's a progression of change on Earth Natural selection IS a theory - the process where organisms better adapted to their environment tend to 'survive' and 'produce more offspring' Change is constant Organic life has changed through time - evident - Fixity of Species? Organic life has not changed since God has created them - life didn't change - People have issues with this idea - Extinct Species? Dinosaurs bitch - Skeleton of dinosaurs in museums - Domestic Animal Breeds? Everybody involved in agricultural - people involved can create new bodies of plants - breed new dogs - Seeing new breeds of cattle/cow - Variation within species Different environments --> species have different variation - Range of variability within species - Travelling around the world and seeing similar looking animals - obvious at this point t some sort of evolution or mutation was happening - LECTURE 2 - Unit 2: Evolution and Natural Selection Sunday, September 15, 2019 11:18 PM
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Incredible Biological Variation So many different types of spiders, butterflies, etc - Noah's Ark - "you only brought two ants" - John Ray Species concept and Genus Genus - genera A species is a group of organisms that is distinguishable from different organism their ability to successfully reproduce themselves" Also grouped species together (genus) - Linnaeus Taxonomy and Binomial Nomenclature - Took the idea of species and expanded it to plants + animals that can be familiarized before - Still believes in "fixity of species" - George Buffon "Species adapt slightly to new conditions" - published book If a species migrated to different area --> would change to adapt to new environment - Vestigial organs/limbs - doesn’t do anything anymore, but it used to -
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Vestigial organs/limbs - doesn’t do anything anymore, but it used to - Lamarck Studies fossils - sees fossil records - Biological evidence on earth is constantly changing - Evolution occurs - "Inheritance of acquired characteristics" - Giraffe necks - - Evidence for Evolution Constant change no matter where you are - cannot see a fossil record that’s unchange - Layers - top layer every where on the globe - you can find fossils that are like the living species - Organic life evolves through time - Charles Darwin Came from a wealthy family - Went on a voyage and was exposed to different things around the world - Voyage of the Beagle Got his idea from the Galapagos Island -
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