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Darwin’s Voyage of Discovery Chapter 16-1
Image from: Biology by Miller and Levine; Prentice Hall Publishing©2006
WRITE A DEFINITION:
change over time; the process by which modern
organisms have descended from ancient
organisms
a well-supported testable explanation of
phenomena that have occurred in the natural world
the preserved remains of ancient organisms
EVOLUTION:
THEORY:
FOSSIL:
The total variety of all the organisms in the biosphere
= ________________
Where did all these different organisms come from?
How are they related?
BIODIVERSITY
REMEMBER !
http://www.millan.net
What scientific explanation can account for the diversity of life?
ANSWER:
A collection of ______________,
__________, and ___________ known as
________________________
Scientific facts observations hypotheses
EVOLUTIONARY THEORY
The person who contributed the most to our understanding of evolution was ______________________ In 1831, at age 22, he joined the crew of the _______________ as a naturalist for a ________ voyage around the world.
Charles Darwin
H.M.S. Beagle
http://harrier.users.netlink.co.uk/Darwin_sm.jpg
Image from: Biology by Miller and Levine; Prentice Hall Publishing©2006
5 year
During his travels, Darwin wrote thousands of pages in his journals, drew pictures of the things he saw, and collected a vast amount of ______________ that led him to propose a _______________________ about the way _____________.
revolutionary hypothesis evidence
life changes
http://www.elsie.brandeis.edu/images/journals.gif http://www.24hourmuseum.org.uk/chg/content/images/2003_2233.JPG
During Darwin’s time, scientists thought the Earth was ________ and _______________________.
Darwin’s work offered insight into how the living world (organisms) show constant _______________ or what he called ____________ over time.
ancient
change
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Image from: Biology by Miller and Levine; Prentice Hall Publishing©2006
evolving
changing over time
DARWIN WONDERED? Why do Argentina and Australia have ________ ______ even though they have ________ grassland ____________? Why are there no ______ in Australia and no ________ in England? Why have so many species disappeared? How are these ______ species related to living species? http://www.rc.umd.edu/praxis/mitchell/images/dinosaur1.gif
different animals similar
ecosystems
rabbits kangaroos
extinct
Who Was Charles Darwin?
While on his voyage around the world aboard the ____________, Charles Darwin spent about one month observing life on the
________________.
There, he encountered some unique animals, such as ______ and ________.
Galápagos Islands
http://www.darwinadventure.com/pictures/galapagos_giantortoise.jpg
http://mikebaird.com/ecuador/images/galapagos_off_ecuador_ng_map.jpg
H.M.S. Beagle
finches tortoises
The Galάpagos Islands are close together but have very different _______.
Some were hot & dry, with little vegetation. Others had more rain with lots of vegetation.
Each island had its own _____ _________ of plant and animal species.
Biology by Miller and Levine; Prentice Hall Publishing©2006
climates
assortment unique For example each island had
tortoises with a unique shell shape adapted for its habitat.
Go to Section:
Pinta Island Intermediate shell
Pinta
Isabela Island Dome-shaped shell
Hood Island Saddle-backed shell Hood Floreana
Santa Fe
Santa Cruz
James
Marchena
Fernandina
Isabela
Tower
Giant Tortoises of the Galápagos Islands
Section 15-1
On the desert-like Hood Island,
tortoises had long necks…
…while on the lush rainforest of Isabela Island,
tortoises had short necks…
and on Pinta Island, tortoise necks
were somewhere in between
After his voyage, Darwin spent a great deal of time thinking about his findings.
He began to wonder if animals living on different islands had once been members of the ____________ that had developed _________ characteristics after becoming _______ from one another in different habitats.
same species different
isolated
rhea
emu
ostrich
S.America Australia Africa
