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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) Population separated by:______________ ______________ ______________ ______________ ______________ _____________ Sympatric Speciation Examples: Population separated by:__________________________ __________________________ __________________________ Rates of Evolution Gradualism: Punctuated equilibrium: Artificial 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 Natural Selection Nature chooses which organisms will survive and reproduce! ________________ chooses which traits will be passed on