Evolution

Page
1

Slide 1

Evolution

Diversity of Life

Slide 2

“Nothing in biology makes sense EXCEPT in the light of evolution.” Theodosius Dobzhansky

Evolution

Charles Darwin in later years

Slide 3

History of Evolutionary Thought

Slide 4

Early Ideas On Earth’s Organisms

Aristotle believed species were fixed creations arranged by their complexity

Idea lasted 2000 years

Slide 5

Early Ideas On Earth’s Organisms

Linnaeus – 1st to group similar organisms and assign them Latin names

Two word name (Genus species)

Known as Binomial nomenclature

Slide 6

:

Contributor’s to Darwin’s thinking included:

Charles Lyell –uniformintarianism (geologic processes still changing Earth)

Georges Cuvier – species extinction (Catastrophism)

Thomas Malthus – struggle for existence (resources)

Slide 7

:

Contributor’s to Darwin’s thinking included:

James Hutton - Gradualism

John Baptiste Lamarck – Inheritance of acquired Characteristics and Law of Use and Disuse

Alfred Russel Wallace – organisms evolved from common ancestors

Slide 8

Evolutionary Timeline

Slide 9

Catastrophism

Idea proposed by George Cuvier

Studied fossil in sedimentary rock strata of Paris

Found some species completely disappeared in more recent layers

Slide 10

Catastrophism

Stated that species disappear due to a catastrophic event of the earth’s crust (volcano, earthquake…)

Slide 11

Hutton’s Theory of Geological Change

James Hutton, 1795, Scottish geologist

Studied invertebrate fossils in Paris Museum

Described The Geological Forces That Have Changed Life on Earth Over Millions of Years (erosion, earthquakes, volcanoes…)

Slide 12

Hutton’s Theory of Geological Change

Changes in Earth’s crust due to slow continuous processes

Idea Known as Gradualism

Slide 13