Darwin’s Theory of Evolution
Ideas that Shaped Darwin’s Thinking
Chapter 15-2
Image from: Biology by Miller and Levine; Prentice Hall Publishing©2006
Ideas that shaped Darwin’s thinking:
James Hutton
In 1785 ______________
proposes that the EARTH
shaped by
was _______
geological forces
_________________
occurring over
very long
__________
periods of
time, and is
millions of years old.
_______________
http://www.creationism.org/books/TaylorInMindsMen/TaylorIMMc03.htm
Ideas that shaped Darwin’s thinking:
Charles Lyell
In 1833 ___________
explains that the geological
Processes, still occurring
___________,
now
have shaped Earth’s
features over
long
periods of time
________________
http://www.biologydaily.com/biology/Sir_Charles_Lyell
Ideas that shaped Darwin’s thinking:
SINCE THEN
Theory of Pangaea
…and continental
drift
http://wrgis.wr.usgs.gov/docs/usgsnps/animate/A08.gif
http://www.nndb.com/people/250/000024178/malthus.jpg
Ideas that shaped Darwin’s thinking:
Thomas
Malthus (1798)
_____________________
He observed that babies were being born
faster than people were dying. He
reasoned that if the human population
continued to grow, sooner or later there
insufficient space & food
would be _______________________
http://www.wasatchcomputers.net/gallery/elk_fight.jpg
competition
Living things must compete for
food, shelter, space, mates
http://www.educa.rcanaria.es/fundoro/00.corsi.htm
Ideas that shaped Darwin’s thinking:
Jean-Baptiste
Lamarck (1809)
___________________________
was one of first scientists
to recognize living things
changed
over time and that
_______________
descended from
all species have ________
other species.
Lamarck published his hypothesis of
Inheritance of Acquired traits
________________________
the year Darwin was born.
Inheritance of acquired traits
The male fiddler crab uses its
attract
front claw to _________mates
predators
and fight off _____________.
repeated use, the
Through _________
front claw becomes ________.
larger
The fiddler passes on this
acquired
__________
characteristic to
its offspring
http://www.geocities.com/arnold_schwarzenegger_pictures/
What’s wrong with Lamarck’s hypothesis?
Lamarck didn’t know about
genes and how traits are
inherited
_______.
If you lifted weights your
whole young adult life, and
then you had children, would
your kids be more muscular?
ACQUIRED traits can ____
PASSED ON
NOT be __________
NO! ________
to their offspring.
What’s right with Lamarck’s hypothesis?
Lamarck was first to
develop a scientific
hypothesis about
evolution
_______
and recognize that
organisms are
adapted to their environments
________________________
http://pegasus.cc.ucf.edu/~he599900/giraffeeating.jpg
Match the letter of the idea with
the man or men who proposed it:
Malthus
Hutton
Lyell
a.
b.
c.
d.
Lamarck
The earth is really old, and slowly changes
Living things pass acquired changes on to their offspring
Sooner or later growing populations run out of resources
Living things change slowly over time because of competition for resources,
and pass those changes on to their offspring
c.
Malthus
Hutton
a.
Lamarck
Lyell
b.
d.
a.
b.
c.
d.
The earth is really old, and slowly changes
Living things pass acquired changes on to their offspring
Sooner or later growing populations run out of resources
Living things change slowly over time because of competition for resources,
and pass those changes on to their offspring