Upload
julia-charles
View
220
Download
0
Tags:
Embed Size (px)
Citation preview
Evolution:
Defining Scientific Theory
Misconceptions
Natural Selection
Evidence for Evolution
What it is and what it isn’tJennifer E. Michnowicz 1
Defining Scientific Facts and Theories
Fact
Theory
2
Misconceptions in Evolution
1. Evolution is only a theory.
3. Individuals can evolve.
4. Adaptations are only beneficial.
5. Survival of the fastest and strongestonly.
6. Evolution has never been observed.
7. People came from apes.3
Evolution is…
4
Natural Selection
Explains mechanism of evolution
“Descent with modification”
DNA mutations are one cause of variation within species
Environment provides selective pressure on adaptations
Those individuals that survive pass on their genes to offspring
5
Evidences of Evolution
The fossil record
Comparative anatomy
Similarities in early development
Comparing amino acid sequences
6
Comparing amino acid sequences
7
Which primate is most closely related to humans?
______________
Which is least closely related to humans?
_____________
Which primate has the most recent common ancestor with humans?
_____________
Evolution
What it isn’t…… What it is
• “Just” a theory Well proven scientific theory theory
• Acquired characteristics Descent with modification
• Survival of the strongest Survival of the luckiest
• A mysterious process Observable
• Only in Biology Permeates all sciences
8