Chapter 12-DNA Flashcards
Theory
Represents ideas and explanations that have been confirmed through questions and observations
Darwin wanted to explain biological diversity he observed scientifically in three ways;
Species vary globally
Species vary locally
Species vary over time
How long did it take to voyage mapping ng coastlines of sout America’s
5years
What did he Darwin notice(species vary globally)?
Different yet ecologically similar animal species inhabited separated yet ecologically similar habits around the globe.
Examples of species vary globally
Flightless birds
Rhea: SA
Ostrich: AFR
Emu: AUS
Species vary locally; he noticed what?
Different get related animal species occupied different habitats locally
Example of species vary locally.
Species of rhea living in SA, one in Argentina other in scrubland of south.
Species over time:
While unearthing fossils, he discovered the long extinct a giant armored animal similar to an armadillo.
James Hutton father of geology.
Originated the theory of uniformitarianismformed naturally through geologic means.
Charleys lyell: “principles of geology”
Popularized uniformitarianism. Wrote a book called principles of geology.
Did Lyell impact Darwin?
Yes, earthquakes repeated over time of the years, etc. Darwin asked himself if earth can change over time.
Jean-Baptiste Lamarck. (1809)
All organisms have an inborn urge to become more complex and perfect.
Examples of organisms inborn urge.
Black necked stilt grew longer yo wade in deeper water and would pass to offspring. (Inheritence of acquired traits)
Thomas Malthus (1798)
Scientist who said that if the populations of grew too large would be reduced by famine, disease and war but was proven inaccurate.
Artificial selection
Process in which nature provides the variations an d humans select
Darwin’s conclusion
Darwin saw variations in wild domesticated species
