'Mass extinctions' diaporamas de présentation

The History of Life on Earth

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Origin and Evolution of Life on Earth Bennett et al. Chapter 5

Origin and Evolution of Life on Earth Bennett et al. Chapter 5. HNRS 228 Astrobiology w/Dr. H. Geller. Origin and Evolution of Life on Earth - Chapter 5 Overview. Searching for the origin Functional beginnings of life From chemistry to biology at the molecular level Prokaryotes and oxygen

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THE FOSSIL RECORD Movement of Ocean Water Surface currents Coriolis Effect

THE FOSSIL RECORD Movement of Ocean Water Surface currents Coriolis Effect. THE FOSSIL RECORD Movement of Ocean Water Surface currents Currents are also affected by the Earth's rotation through the Coriolis Effect . Currents in the northern hemisphere tend to be

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Evidence for Evolution

Evidence for Evolution. Fossils. Evidence for evolution. Fossils. Show: Evolution Primer: How do we know evolution happens?. Evidence for evolution. DNA All life uses the same 4 DNA bases: thymine, adenine, guanine, cytosine

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AP ENVS

AP ENVS. THURS DEC 19 2013. THE VOCABULARY OF EVOLUTION. Population Selection pressure Adaptation/Adaptive trait Genetic variation Mutation Directional selection Stabilizing selection Disruptive selection Divergent evolution Convergent evolution Artificial selection Speciation

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Chapter One Game Show!

Chapter One Game Show!. You gotta LOVE Earth Science!. 1. Name the steps of the Scientific Method (in chronological order, please). 2. What is an element?. 3. What are the four branches of Earth Science?. 5. True or false: asphalt is considered to be biodegradable. Why or why not?. 4.

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studied to become a clergyman at Cambridge University (1827-1831)

Charles Darwin. born in Shrewsbury, England, in 1809. studied medicine at Edinburgh University (1825-1827) where the sight of blood and surgery without anesthetics repulsed him. studied to become a clergyman at Cambridge University (1827-1831).

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Primate Evolution

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Extinctions: The End of Biodiversity

By C Kohn, Waterford, WI. Extinctions: The End of Biodiversity . What is extinction? . Extinctions occur when the last individual of a species dies out. Functional Extinctions occur when individuals remain but the odds of sustainable reproduction are low

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Extinction: past, present, future

Extinction: past, present, future. Material: Gwen Raitt. BCB 341: Principles of Conservation Biology. What is Extinction?. Extinction is the process through which a species or higher taxonomic category ceases to exist.

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Today

Today. Hand in any work needed. Get out a small piece of paper, PUT YOUR NAME ON IT. When bell rings the quiz will start and you will have 1 minute per question to answer. Question 1. List the order the rocks came in First Second Third Forth Fifth Sixth. Question 2.

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Patterns in Evolution

Patterns in Evolution. Key concept : Evolution occurs in patterns. Evolution through natural selection is not random. Natural selection can have direction. The effects of natural selection add up over time. Convergent Evolution.

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Patterns in Evolution

Patterns in Evolution. Key concept : Evolution occurs in patterns. Evolution through natural selection is not random. Natural selection can have direction. The effects of natural selection add up over time. Convergent E volution.

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KEY CONCEPT Evolution occurs in patterns.

KEY CONCEPT Evolution occurs in patterns. Evolution through natural selection is not random. . Natural selection can have direction. The effects of natural selection add up over time. Convergent evolution describes evolution toward similar traits in unrelated species. kit fox. red fox.

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7.5 Other Objects in the Solar System

7.5 Other Objects in the Solar System. Comets, dwarf planets, meteoroids and asteroids are other important objects in the solar system Objects that circle the Sun beyond the orbit of Neptune are called trans- Neptunian objects

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Interaction of Dynamics And Structure in Food Webs Jonathan Cannon Gavin Fay Andrew Hein

Interaction of Dynamics And Structure in Food Webs Jonathan Cannon Gavin Fay Andrew Hein Vanessa Weinberger. Background. The dynamical perspective on food webs asks how populations of consumers and producers vary over short time scales.

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Fossils and Evolution

Fossils and Evolution. Amazing Events in Life History. Sex - Who Needs It? We are a team - Mitochondria The Great Freeze 900-600 m.y. ago What survived and how? Mass Extinctions Dinosaurs = 4th worst Permian extinction (220 m.y. ago) took out 90% of all species. Mass Extinctions.

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Biodiversity

Biodiversity. Day 6. What is Biodiversity?. The variety of life in an area that is determined by the number of different species in that area. There are 2 main types:. The variety of genes in a population. Number of different species in a community. 1) Genetic Diversity.

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Practice Clicker Quiz

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