1. Evolution Chapter 16-1, 16-2
Image from: Biology by Miller and Levine; Prentice Hall Publishing©2006

2. A. What scientific explanation can account for the diversity of life?
A collection of scientific facts,
observations, and hypothesis known as the
EVOLUTIONARY THEORY

3. Charles Darwin The person who contributed most to our understanding of
Charles Darwin
The person who contributed
most to our understanding of
evolution
In 1831, he joined the crew of
the H.M.S. Beagle as a naturalist for
a 5 year voyage around the world.
Image from: Biology by Miller and Levine; Prentice Hall Publishing©2006

4. Darwin collected a vast amount of evidence that led him to propose a evolutionary hypothesis about the way life changes.

5. C. The Galάpagos Islands
are close together but have very different climates
Some had hot and dry while others had more rainfall & vegetation
Each had
its own unique
assortment of
plant & animal
species
Biology by Miller and Levine; Prentice Hall Publishing©2006

6. Giant Tortoises of the Galápagos Islands
Section 15-1
and on Pinta Island, tortoise necks
were somewhere in between
Pinta
Tower
Pinta Island Intermediate shell
Marchena
James
Fernandina
Santa Cruz
Isabela
Santa Fe
Hood Island
Saddle-backed shell
Floreana
Hood
On the desert-like Hood Island,
tortoises had long necks…
Isabela Island
Dome-shaped shell
…while on the lush rainforest of Isabela Island,
tortoises had short necks…

7. D. Darwin’s Thoughts Wondered if animals living on
different islands had once been members
of same species
Then developed different characteristics
after becoming isolated from one
another in different habitats

8. Jean-Baptiste Lamarck (1809)
Ideas that shaped Darwin’s thinking:
___________________________
was one of first scientists
to recognize living things
_______________ and that
all species were ________ from
other species.
Lamarck published his hypothesis of
________________________
the year Darwin was born.
Jean-Baptiste Lamarck (1809)
changed over time
descended
Inheritance of Acquired traits

9. The male fiddler crab uses its
front claw to _________mates and fight off _____________.
attract
predators
repeated
Through _________ use, the front claw becomes ________.
larger
The fiddler passes on this __________ characteristic to its offspring
acquired

10. What’s wrong with Lamarck’s hypothesis?
Lamarck didn’t know about
genes and how traits are _______.
If you lifted weights your
whole young adult life, and
then you had children, would
your kids be more muscular?
inherited
ACQUIRED
PASSED ON
NO! ________ traits can ____ be __________ to their offspring.
NOT

11. What’s right with Lamarck’s hypothesis?
Lamarck was first to
develop a scientific
hypothesis about
_______
and recognize that
organisms are
________________________
evolution
adapted to their environments