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Name________________________________________________
Evolution Lecture Notes Part III
Microevolution
When organisms change in _____________________ over time (their traits change)
Does not create a NEW species
Ex: _________________________________________
Macroevolution
Much bigger evolutionary changes that ________________________________________
Ex: Darwin’s ________________ separated for so long, they evolved into separate species
Natural Selection revisited
New ___________________________ sequence are constantly being generated in a population's gene pool
› some of these changes will be beneficial and result in traits that allow ________________and survival
› Some will be __________________________traits and become less common
Speciation
Geographic Isolation
When geographic isolation results in a new species it is called __________________________________.
A population has been separate for long enough and develop so many different traits that they can no longer ____________________________!
Geographic Separation: A ______________________________ A canyon. Rivers, streams, or an _______________. A desert.
Allopatric Speciation Examples:
Separated by __________________ Separated by __________________ Separated by __________________
Behavioral Isolation:
When behavioral isolation results in a new species (NO geographic separation) it is called ________________ ______________________.
Behavioral differences:
___________________________ Food to eat Habitat (Type of tree to live in) Communication (different noises, songs, interactions)
Sympatric Speciation Examples:
Rates of Evolution
Gradualism:
Punctuated equilibrium:
Artificial Selection Natural Selection
You chose the rose, a dog-breeder chose the dog, and a farmer chose which tomato he wanted to grow
____________________________ which traits will be passed on
Nature chooses which organisms will survive and reproduce!
________________ chooses which traits will be passed on
Population separated by:-______________________________________________________________________________
Population separated by:-___________________________________________________________________________________