1. 15-2 Ideas That Shaped Darwin’s Thinking
Photo credit: Richard Hutchings/Photo Researchers, Inc.

2. Darwin’s Observations

3. Darwin’s Observations
15.1 NOTES #1
Describe the pattern Darwin observed among organisms of the Galapagos Islands.
MANY PLANTS AND ANIMALS SEEMED WELL SUITED TO THEIR ENVIRONMENTS.
THE CHARACTERISTICS OF MANY ANIMALS AND PLANTS VARIED AMONG THE DIFFERENT ISLANDS

4. An Ancient, Changing Earth
Homework #1
Hutton and Lyell helped scientists recognize that Earth is many millions of years old, and the processes that changed Earth in the past are the same processes that operate in the present.
1785 – James Hutton
1833 – Charles Lyell

5. An Ancient, Changing Earth
15.2 NOTES #2
State how Hutton and Lyell described geological change.
HUTTON – EARTH WAS SHAPED BY GEOLOGICAL FORCES THAT TAKE PLACE OVER MILLIONS OF YEARS.
LYELL – GEOLOGICAL PROCESSES OCCURING NOW HAVE SHAPED EARTH’S FEATURES OVER LONG PERIODS OF TIME.

6. Lamarck’s Evolution Hypotheses
Lamarck’s 3 Hypotheses
Organisms want to be complex and perfect
Organisms can change the size and shape of their bodies through use and disuse
Acquired traits (things you get AFTER you are born) are inherited by offspring
Homework #2
1809 – Jean-Baptiste Lamarck

7. Human Genes and Chromosomes
15.2 NOTES #2
Identify Lamarck’s explanation of how species evolved.
SPECIES EVOLVE BY SELECTIVE USE OR DISUSE OF ORGANS, THIS LEADS TO ACQUIRED OR LOST TRAITS. THESE TRAITS CAN THEN BE PASSED TO OFFSPRING LEADING TO SPECIES CHANGE.

8. Population Growth Too many babies!!!
Malthus published a book saying babies were being born faster than people died.
If human population continues this way, sooner or later there will be insufficient space and food for everyone.
1798 – Thomas Malthus

9. Population Growth
Homework #3
War, famine, and disease.

10. Population Growth 15.2 NOTES #3
Describe Malthus’ theory of population growth.
THE HUMAN POPULATION WILL GROW FASTER THAN THE SPACE AND FOOD SUPPLIES NEEDED TO SUSTAIN IT.

11. Vocabulary Evolution – change in a species over time
Theory – a well-supported testable explanation of phenomena that have occurred in the natural world
Fossil – preserved remains or evidence of an ancient organism

12. Vocabulary Ancient – very old
Geology – the scientific study of the origin, history, structure, and composition of Earth
Acquired Traits – traits an organism gets during its lifetime that can not be passed down to it’s offspring

13. Today’s Activity
Adaptations of Birds