Download “Nothing in biology makes sense except in the light of evolution”.

Activating Strategy
• Evolution Survey
– Respond to the following statements with a "true" or
"false" according to how you think biologists
understand evolution
– NOT necessarily whether you agree with it or not.
“Nothing in biology makes sense
except in the light of evolution”.
~Theodosius Dobzhansky
AP Lesson #59
EQ: What IS Evolution?
Is evolution a theory, fact, or both?
• There is a theory of evolution and there is fact
of evolution
– Fact of Evolution
• Populations and species change over time
Supported by fossil record
• Ex. VRE and MRSA
– Theory of Evolution
• Mechanism behind the facts of evolution
1
What is today’s definition of evolution?
• Evolution
– Decent with modification
– Change in genetic composition of a population from
generation to generation
• Evolution as a Pattern
– Data are facts, observable in the natural world
• Evolution as a Process
– Mechanism that produces the observable changes
– Charles Darwin
Who was Charles Darwin?
• British naturalist
– Proposed the idea of
evolution by natural
selection
• Collected clear
evidence to support his
ideas
• February 12, 1809 –
April 9, 1882
Whose ideas helped shape the Theory of Evolution?
Scientist
What did they bring to the “table” of
evolution?
Aristole
Linnaeus
Cuvier
Hutton
Lyell
Lamark
2
Where did Darwin collect his data?
• Voyage of the HMS Beagle (1831-1836
22 years old!)
– Main mission of the Beagle was to chart
South American coastline
– Plants and animals of South America were
very distinct from those of Europe
Where did the HMS Beagle travel?
• Stopped in Galapagos Islands
– 500 miles off coast of Ecuador
What is so special about the Galapagos?
• Species on the
Galápagos live nowhere
else in the world
– they resemble
species living on the
mainland
500 miles west of mainland
3
What did Darwin see?
What was the result of his observations?
• Origin of Species
– Decent with modification
• Today’s species are
descendants of ancestral
species that were
different
• Ancestors accumulated
diverse adaptations
– Natural Selection
• Match between
organisms and their
environment
Summarizing Strategy
• 3–2–1
– 3 most important things learned
– 2 questions that still need to be answered
– 1 way this information connects to what you knew
before
• HW: Read Chapter 22 in Textbook
4
Assessment
• HW:
5