Slide 3 of 25
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
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
Slide 5 of 25
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.
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
Slide 7 of 25
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.
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
Slide 10 of 25
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.
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
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
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