Download NOTES: DARWIN PRESENTS HIS CASE 16.3 Darwin`s Book (1859

Name ___________________________________
NOTES: DARWIN PRESENTS HIS CASE 16.3
Period ______ Date ____________ Seat _______
Darwin’s Book (1859)
Describes
On the Origin of Species
Hutton
(Earth is very old)
Ideas came from
Malthus
Consists of 4 main ideas
(Populations fluctuate)
Lamarck
T ime)
Lyell
T ime)
Natural Selection: The process by which organisms
that are most suited to their environment survive and
reproduce most successfully.
(Present is key to Past)
(Evolution is Natural)
T ime)
T ime)
Larger
Size
More
Aggressive
Darwin’s
Finches
Large seeds
Camouflage: Dark
color with pale
bellies
Just Keep
Darting and
Dodging for
500 yds
Fruits
Lateral line
Light and flexible
cartilage
Small seeds
Insects
Streamline body
Snout picks up
electrical signals
Sharp, serrated teeth
Rudder-shaped pectoral fins for
quick direction changes
0 – 60 in
3.0 sec
1
1. Struggle for Existence
Members of a population must compete
food
for _________,
water, living space, and
other things needed to live.
2. Variation of Heritable Traits
Members of a ________________
have
population
differences in traits that can be passed
offspring
on to ________________.
3. Adaptation
A ________________
characteristic that
heritable
increases an organism’s ____________,
fittness
or ability to _______________
and
survive
reproduce
______________
in an environment.
4. Survival of the Fittest
How well an organism’s heritable traits or
adaptations
_________________
help it survive and
environment
reproduce in its ____________________.
Name ___________________________________
NOTES: DARWIN PRESENTS HIS CASE 16.3
Mean beak size is smaller
during rainy years
Mean beak size is larger
during drier years
Examples of Natural
Selection
Period ______ Date ____________ Seat _______
Darwin’s Finches
Pre-Industrial
Revolution
Descent with modification: Over time, older species
evolve into new species (evolution).
Descent with Modification
Common Descent: The idea that organisms
share ancient ancestors.
Soot-covered
Tree Bark
2
Common ancestor of all life (3.8 bya)