Download Evolution-Slot Notes Part One Darwin`s Theory Evolution: The

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