Happy Thursday 1016 Write your thoughts on these

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Happy Thursday (10/16) Write your thoughts on these pictures. How do they relate to

Happy Thursday (10/16) Write your thoughts on these pictures. How do they relate to evolution?

History of Life on Earth • SB 5. b- Students will evaluate the role

History of Life on Earth • SB 5. b- Students will evaluate the role of natural selection in the development of theory of evolution. • b. Explain the history of life in terms of biodiversity, ancestry, and the rates of evolution. • c. Explain how fossil and biochemical evidence support theory. • https: //www. youtube. com/watch? v=d. Y ph. AH 2 t. KYE – David A. 10 min Video/Intro

History of Life on Earth • Began approximately 4. 6 billion years ago •

History of Life on Earth • Began approximately 4. 6 billion years ago • Current speculations on formation of Earth – constant volcanic and geological upheaval – Anaerobic (no oxygen) – Finally began to cool and form liquid water

Origin of Life: Prokaryotes • Life first appeared a few million years after formation

Origin of Life: Prokaryotes • Life first appeared a few million years after formation of Earth – First organisms prokaryotic • Some prokaryotes created oxygen

Origin of Life: Eukaryotes Eukaryotic cells appeared approximately 1. 8 billion years ago •

Origin of Life: Eukaryotes Eukaryotic cells appeared approximately 1. 8 billion years ago • Endo- symbiotic theory • Ancestors of eukaryotic cells lived in close proximity to bacteria and algae cells • Formed a symbiotic relationship – This how mitochondria and chloroplasts were created

Origin of Life: Eukaryotes cont. • Eukaryotic organisms continued to evolve • • Sexual

Origin of Life: Eukaryotes cont. • Eukaryotic organisms continued to evolve • • Sexual reproduction began – Genetic variation – New organisms – Multi-cellular life

Geological Time Scale • Represents the evolution of biodiversity • 4 eras: Precambrian, Paleozoic,

Geological Time Scale • Represents the evolution of biodiversity • 4 eras: Precambrian, Paleozoic, Mesozoic, and Cenozoic • Each era is broken into periods

Precambrian • • Earth formed and first life appeared Prokaryotic to eukaryotic cells Sexual

Precambrian • • Earth formed and first life appeared Prokaryotic to eukaryotic cells Sexual reproduction begins Multi-cellular organisms appear – Sponges, cnidarians, and annelids • Note: All life is aquatic!!

Paleozoic Era 543 Million Years Ago • Cambrian explosion – rapid appearance, of most

Paleozoic Era 543 Million Years Ago • Cambrian explosion – rapid appearance, of most major animal phyla – Approximately 490 -443 MYA, life on land appeared – Mass extinction occurred at end of this era (252 MYA) • Wiped out 90 -95% of aquatic life, 60 -70% terrestrial life

Mesozoic Era 248 Million Years Ago • Mammals, dinosaurs, birds and flowering plants appear

Mesozoic Era 248 Million Years Ago • Mammals, dinosaurs, birds and flowering plants appear • Dinosaurs dominated • End of era meteorite hit near the north coast of the presentday Yucatan – 75% of life goes extinct – Nothing above 25 kg (55 lbs) survive

Pangea • Pangea was a supercontinent • Plate tectonics helped to change the environment.

Pangea • Pangea was a supercontinent • Plate tectonics helped to change the environment. • Caused drastic geological changes throughout the Mesozoic era into the Cenozoic era • Plates began to drift apart • Allowed for new species and environments to form

Cenozoic Era 65 Million Years Ago to Present Day • After the mass extinction,

Cenozoic Era 65 Million Years Ago to Present Day • After the mass extinction, mammals began to diversify into distinct groups • 500, 000 years ago Homo sapiens and Neanderthals lived • 65, 000 years ago Neanderthals die out

Quick Recap • https: //www. youtube. com/watch? v=ZSt 9 tm 3 Ro. UU –

Quick Recap • https: //www. youtube. com/watch? v=ZSt 9 tm 3 Ro. UU – Life in 1 minute • https: //www. youtube. com/watch? v=7 PQU Rsc 2 SYs – Mr Parr Eras song

Fossils • Study of fossils is called paleontology • Fossils are the remains of

Fossils • Study of fossils is called paleontology • Fossils are the remains of once living organisms found in the rock layers of earth – Found in sedimentary rock • Used to establish relationships among extinct and existing organisms!

Fossil Record • Show evidence of evolution by providing “snap shots” of ancient organisms

Fossil Record • Show evidence of evolution by providing “snap shots” of ancient organisms • Used to create evolutionary charts to show modern day organisms evolved • Ancestry is the history of an organisms development

How Old Are Fossils? Grand Canyon

How Old Are Fossils? Grand Canyon

Now for a song… • https: //www. youtube. com/watch? v=RNSr. N T-n. IDE –

Now for a song… • https: //www. youtube. com/watch? v=RNSr. N T-n. IDE – Mr Parr • https: //www. youtube. com/watch? v=Cl. J 5 lwl _w. M 0 – Fossils Rock Anthem