Download Evolution: The Origin of the Species

Evolution: The Origin of
the Species
To realize the significance of
Charles Darwin’s original
thoughts and ideas
Charles Darwin: Facts
Developed idea of Natural Selection
 1831 began voyage on HMS Beagle
 employed as a naturalist
 Was the 3rd Choice for the job
 voyage was to take 5 years with no
pay
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Charles Darwin: Actions
Studied and collected thousands of lifeforms during 5 year journey
 most famous for his observations on the
Galapagos Islands
 studied and observed 14 different kinds
of finches on the islands
 found one dominant type on each island;
each one was different
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Charles Darwin: The Finches
14 different versions of finches
existed on Galapagos Islands
 Usually 2 types of finch were located
on an island but 1 type was more
dominant
 major difference between finches was
beak size; shape
 beaks were deciding tool in success
failure of birds to survive
 beaks were primary tool for food
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Charles Darwin: Post G.I.
Studied findings on finches and other
life-forms for 20 years
 from his studies wrote book entitled
The Origin of the Species in 1859.
 Was not well received; went against
religious beliefs
 revolutionized modern scientific
thought
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Charles Darwin: 4 Main
Points of Book
All organisms produce more offspring
than can survive
 Variations exist in all populations of
species
 Some variations are better than
others; more beneficial for survival
 Overtime offspring of more successful
organisms will make up the population
of species
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Charles Darwin: The
Outcome
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Book basically states that Natural
Forces are primary reasons for a species
evolving; not divine powers
Evolution, therefore continually is
happening
Variations acted upon by Natural
Selection Forces (En, Dis, CF & Pred)
Variations are caused by numerous
factors most likely of which are
mutations in an organisms DNA, that
then are passed on (modern genetics)
Outcome: fields of Science IMPACTED
or advanced by Darwin’s views
Modern Biology
 Modern Medicine
 Genetics
 Environmental / Ecology Sciences
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