Evolutionary Timeline

Main

Mutability

1707 - 1788

Dynamic relationships between organisms and the environment

Binomial Nomenclature

1707 - 1778

Organized system of naming creatures
-tells us something about similarities between organisms
Invented to glorify God's divine creations
Organisms are fixed at creation

Inheritance of Acquired Characteristics

1744 - 1829

Species could change if they had the will to
-ex: giraffes needed long necks to eat; over time generations grew with longer necks
First theory of evolution
Law of Use and Disuse
-if the change is no longer needed, it will go back

Population Limitations

1766 - 1834

Population is limited by food supply
-abundance of food would alow indefinite population growth
Those who successfully compete for food survive and reproduce
Important influence on Darwin's Theory of Natural Selection

An Essay on the Principle of Population

1798

HMS Beagle

1831 - 1836

The things he observed on the trip caused Darwin to question previous beliefs. He began to hypothesize about the origin of various species

On the Origin of Species

1859

Natural Selection - descent with modification: changes take place due to changes in gene frequency over time
-not all born survive; competition for survival
-mechanisms of change: variations in population, reproductive success, some variations become more common over time
Finches:
1. for every pair of organisms, many offspring are produced
2. for most, population size remains the same
3. population limited by food
4. members compete for food
5. no two members of a species are exactly alike

Scopes "Monkey" Trial

1925

Tennessee vs. John Scopes
Scopes taught evolution in science class, Tennessee did not allow this

Ban on Teaching

1968

U.S. Supreme Court ruled that laws banning the teaching of evolution unconstitutional

Creation Science

1979 - 1987

Claimed that if evolution is taught in schools, Creation Science must also be taught
Edwards v. Aguillard overturned in 1987