Happy Thursday 1016 Write your thoughts on these
- Slides: 17
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 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 • 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 of Earth – First organisms prokaryotic • Some prokaryotes created oxygen
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 reproduction began – Genetic variation – New organisms – Multi-cellular life
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 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 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 • 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. • 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, 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 – 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 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 • 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
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
- Happy he
- I am not my thoughts
- 1016 de 1989
- On a sheet of paper answer the following questions
- Beauty is seen in the sunlight the trees the birds
- Shakespeare quatrain
- I was alone in my bed with these thoughts in my head
- In your notebook, write questions
- In your notebook write down the times
- In your notebook write what these
- In your notebook write how often dug does these activities
- In your notebook write
- In your notebook write consequences of these situations
- Sad is to happy as bored is to
- Happy angry sad
- Happy sad hungry
- Happy feet underlay
- A penny for your thoughts if it's a 1943