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Evolution-Slot Notes Part One Darwin’s Theory • Evolution: The process in which ____________________characteristics within a population change over _____________________ such that new ________________ sometimes arise. • Species: A __________________ of organisms that are closely related and that can mate to produce fertile ______________________. • Variation: A ________________________ in characteristics, or ________________ among members of the same ____________________. • Adaptation: A characteristic that ______________________ an individual’s ability to survive and _______________________ in a particular environment. Charles Darwin • In 1831, a 22 year old named Charles Darwin served as a “______________________” on the HMS beagle during its 5-year ______________ around the world. • Darwin’s important discoveries included the diversity of ___________________ things, the remains of ______________________ organisms, and the ______________________ of organisms of the Galapagos _____________________. Natural Selection • The _____________________ by which individuals that are better _________________ to their environment survive and _________________________ more successfully than less ___________________ adapted individuals. • A theory to explain how ______________________ happens. • Overproduction – more _________________ are born than can ___________________. • Inherited Variation – there are differences within the__________________ of every population or _________________ ( the result of random mutation and translation errors) • Struggle to Survive – Because of the overproduction, there is a ____________________ for limited ______________________. Some individuals are better suited to _________________ as a result of _____________________. • Selection– Darwin proposed that over a long time, ___________________ selection can lead to change. Helpful _____________________ will gradually accumulate in a species, while unfavorable ones may _________________________.