Focus Lesson: You should be
working on your “Taking it to the
Next Level” Column.
If this was a test question could you
answer it? The EOC is only 83 days
away!
Remember our procedures!
Grab your group’s pencil box.
Have your id out.
Daily Objective
• Explain the theories proposed on the origin of
life.
• Compare contradictory theories, such as the
Cell Theory and the Theory of Life.
• Describe the observations used to support
the Theory of Evolution.
How will we get there?
Last Class
• Notes: Hominid Evolution Pg
27
• Revisting Darwin Pg 26
• Origin of Life timeline Pg 28
Today’s Class
• Origin of life notes Pg 29
• I.P. Origin of Life Pg 31
– Pg 387: 4,17,19,27 (EC18,20)
• Contradicting Theories Pg
30
• Gallery Walk: Evolution Pg
32
• Home Learning
– Flashcards
– Page 35
WHAT WAS EARTH LIKE BILLIONS OF YEARS AGO?
Violent and hot
 So hot that it was likely in a molten state!
Air was made of ammonia, water vapor, methane and
CO2
 VERY little Oxygen
As Earth began to cool the water vapor fell to the earth
creating vast oceans.
ORGANIC MOLECULE HYPOTHESIS
MILLER-UREY EXPERIMENT (1953)
Scientists recreated the inorganic
atmosphere of early Earth
Simulated lightning to demonstrate how
electrical current could create organic
molecules from a mixture of gases.
Organic molecules created included amino
acids. Why is this monomer so important to
life?
REVIEW
Organic compounds contain what TWO atoms?
Carbon
Hydrogen
Organic Molecules must be
formed before life can exist
WHAT WAS THE FIRST LIFE LIKE?
Anaerobic organisms…why?
Single celled prokaryotes
Asexual Reproduction
Heterotrophs…why?
WHAT CAME NEXT?
• Autotrophs…why?
• Endosymbiosis
The creation of the Eukaryotic cell.
Smaller free-living bacteria were enclosed
within a larger cell becoming what we know
today as organelles
• Multicellular organisms
• Sexual Reproduction--how would this
influence evolution?
• HUMANS
WHICH ONES ARE BIOTIC? ABIOTIC?
PAGE 31- INDEPENDENT PRACTICE
Volume level zero
Using the textbook answer questions 4, 17, 19,
27 from page 387
If you complete earlier than time is called
complete extra credit questions
18
20
Make me Proud!
PAGE 30
In your notebook:
Compare and Contrast the Theory of the Origin
of Life with the cell theory proposed by
Francisco Redi? Recall that Francisco Redi
disproved spontaneous generation in the 17th
century.
HOME LEARNING
Create flashcards for any new
vocabulary. #YOLO
Remember to keep an open mind
when discussing theories.
It is not a fact
It is not something that has to be proven
It is one attempt to answer questions raised
by observation.
(EX AMPL E: HAV I N G A LON GER
NECK WOULD BE A
FAVORAB L E T RAI T B EC AUS E
T H E Y C A N E AT M O R E F O O D ! )
OBJECTIVES
SWBAT explain why fossil records are evidence
for the theory of evolution.
SWBAT explain how geographic isolation and
environmental differences leads to speciation.
SWBAT describe how homologous structures
and similar embryology demonstrate common
ancestry.
SWBAT define the concept of coevolution.
INTRODUCTION
Evolutionary biology's rarely get all of the
pieces of what they are studying.
So what do they do??
Make inferences!!
GALLERY WALK: PAGE 32
Each group will travel to different
stations around the room to view
different pictures.
At each picture the group must
answer the prompts.
REFLECT
Debrief:
What inferences did you make at these
pictures?
What type of evidence might paleontologists
(people that study fossils) find that would
allow them to see the big picture of a species’
evolutionary past?
A
B
C
D E
F
BIG QUESTION
Before fancy technology, how did people figure out what evolved from what?
FOSSIL RECORDS
Mineralized material (ex. bone).
Records changes in a species over time.
Can see possible common ancestry between 2 species.
FOSSILS AND STRATIGRAPHY
How do scientist’s know how old fossils
are?
STRATIGRAPHY- the order of rock and dirt layers in
the soil. Science was pioneered by Charles Lyell.
 Law of Superposition states that new material will
accumulate ABOVE older material.
A homo ergaster is found below a homo erectus.
What conclusion can you draw based on Lyell’s law?
ANATOMY
Homologous Structures: body parts
on different species that are similar
and most likely evolved from a
common ancestor.
MISCONCEPTION
You may see the words analogous
structures on the EOC
This is NOT the SAME!!!
Analogous Structures: Two
UNRELATED organisms have
similar functions
Similar Problem= Similar Solution
EMBRYOLOGY
Similar features of
embryos (unborn
offspring) in different
organisms suggest
evolution from a
common ancestor.
VESTIGIAL STRUCTURES
Structures that had a function in an early ancestor
but are no longer useful
VESTIGIAL STRUCTURES CONTINUED
Organisms that share these structures share a
common ancestor.
Shrink because they no longer have a function
Other examples include: eyebrows, male nipples
BIOGEOGRAPHY
Geographic isolation and environmental
differences could lead to speciation.
Speciation= formation of new species.
COEVOLUTION
Coevolution: process in which 2+ species evolve in response to
changes in each other.
 “An arms race between interacting species”
Example: Bat vs. Moth
 http://www.youtube.com/watch?v=O8psKvn0_3w
BACK TO OUR BIG QUESTION…
Before fancy technology,
how did people figure
out what evolved from
what?
WE DO!
This picture
describes the
process of
___________
This picture describes the
process of ___________
This picture describes the
process of ___________
This picture is an example
of ____________________
WHAT ARE 5 METHODS WE CAN USE TO PROVE
COMMON ANCESTRY BETWEEN TWO SPECIES?
Embryology
Fossil Records
Homologous structures
Vestigial Structures
Biogeography
HOME LEARNING: PAGE 35
Apply your knowledge on this worksheet.
You will have a quiz next class that covers:
Darwin and Natural Selection
Hominid Evolution
Origin of Life
Evidence of Evolution
THIS IS A BIG QUIZ! PREPARE YOURSELF
WITH THIS PRACTICE, FLASHCARDS AND
REVIEW!