Transcript SB5. Students will evaluate the role of natural selection

Lesson Focus: Evidence for Evolution
Georgia Performance Standards for Biology
SB5 Students will evaluate the role of natural selection in the development
of the theory of evolution.
b. Explain the history of life in terms of biodiversity, ancestry, and the
rates of evolution.
WARMUP FOR WEDNESDAY, NOVEMBER 5
In your notebook, write down the similarities between the two sisters on
the left and the two Elvis impersonators on the right.
Do they look alike for the same reasons?
Sisters
Elvis impersonators
Lesson Focus: Evidence for Evolution
Do they look alike for the same reasons?
Similarities are
inherited
Sisters
Similarities are
due to other
reasons
Elvis impersonators
Lesson Focus: Evidence for Evolution
Similarities are important in biology.
Some traits
shared by two
living things are
inherited from an
ancestor.
Sisters
Some similarities
evolved in other
ways.
Elvis impersonators
Lesson Focus: Evidence for Evolution
Similarities are important in biology.
Some traits
shared by two
living things are
inherited from an
ancestor.
Sisters
Some similarities
evolved in other
ways.
Elvis impersonators
Lesson Focus: Evidence for Evolution
Similarities are important in biology.
Some traits
shared by two
living things are
inherited from an
ancestor.
human
hand
dog
paw
Some similarities
evolved in other
ways.
bird
wing
butterfly
wing
Lesson Focus: Evidence for Evolution
Similarities are important in biology.
Some traits
shared by two
living things are
inherited from an
ancestor.
Some similarities
evolved in other
ways.
bird
wing
butterfly
wing
human
hand
dog
paw
HOMOLOGOUS
ANALOGOUS
Lesson Focus: Evidence for Evolution
Similarities are important in biology.
Some traits may
become reduced or
lose their function.
Example: Python
limb buds
VESTIGIAL
Lesson Focus: Evidence for Evolution
Comparative Anatomy: Scientists compare the
anatomy of different organisms to figure out how
closely they are related.
Lesson Focus: Evidence for Evolution
Frayer Models for Comparative Anatomy Terms
Homologous • Vestigial • Analogous
Definition
Support for Evolution?
Word
Example
Non-Example
Lesson Focus: Evidence for Evolution
Comparative Anatomy Terms
• Homologous – anatomically similar structures
inherited from a common ancestor
• Vestigial – structures inherited from a common
ancestor which become reduced in size or lose their
function over the course of evolution
• Analogous – structures with similar functions but
different constructions; NOT inherited from a
common ancestor