11/10/10 – “F” Day
Objective:
To understand how life evolved from
coacervates to complex multicellular creatures.
Do Now:
What molecules were necessary for life to exist?
Today:
Complete Geologic Timeline Activity
Early Earth and Evolution Notes
HW – Webquest to be completed by Monday,
working at library later this week!
11/12/10 – “B” Day
Objective:
To understand how life evolved from
coacervates to complex multi-cellular creatures.
Do Now:
What were the first living organisms like?
Today:
Geologic Timeline/Rock Strata Data
Big Bang to Eukaryotic Cell Activity
HW – Webquest to be completed by Monday,
working at library later this week!
11/15/10 – “C” Day
Objective:
To understand how life evolved from
coacervates to complex multi-cellular creatures.
Do Now:
Get out John Kyrk Evolution Questions – Any
Questions?
Today:
John Kyrk Evolution – HW Quiz
IRP Logbook Expectations
Early Earth Notes
Which Came First Activity
11/16/10 – “D” Day
Objective:
To understand how life evolved from
coacervates to complex multi-cellular creatures.
Do Now:
How did coacervates (cells) change over time?
Today:
STATS help announcement
Finish Notes
Earth History – Evolution of Coacervates Activity
11/17/10 – “E” Day
Objective:
To understand how life evolved from
coacervates to complex multi-cellular creatures.
Do Now:
Which came first (Explain) chemical evolution
or evolution of life?
Today:
STATS help today after school
Origin of Life
11/18/10 – “F” Day
Objective:
To understand how life evolved from
coacervates to complex multi-cellular creatures.
Do Now:
Today:
Complete Origin of Life
Discuss/Read Margulis Article
Tomorrow:
Eukaryotic vs.
Prokaryotic –
Microscope
Inquiry Lab
11/22/10 – “B” Day
Objective:
To compare the structures of prokaryotic and
eukaryotic cells
Do Now:
What is a prokaryote? A eukaryote?
Today:
Microscope Lab!
11/23/10 – “C” Day
Objective:
To compare the structures of prokaryotic and
eukaryotic cells
Do Now:
On Low power…
what is the
diameter of this
microbe?
Today:
Continue Microscope Lab!
“I have… You have…”
Earth (Life) History
1. The Big Bang Theory
14 Billion Years ago
• Currently accepted explanation for
beginning of universe
• Based on the theory of relativity
• Cosmic Explosion (“BIG BANG”) universe has been expanding and cooling
since then
• * Supporting evidence: Cosmic background
radiation
2. Cosmic dust and gas condense
forming planets and stars.
• Planet Earth forms! 4.6 BYA
Gases are released from volcanoes, etc..
Atmosphere created
3. Reducing Atmosphere - held in
place by gravity.
• Contains N2 (Nitrogen gas) , CO2, H2O, and
maybe H2S (hydrogen sulfide), NH3
(ammonia) and CH4 (methane).
• There was no O2 or O3
• Earth Surface  U.V.
4. UV radiation chemical evolution
• Warm oceans
• lots of N2, H2S, NH3
•  energy
Organic Soup
5. Organic Soup
• a.a., lipids, & carbs clump together in a
primitive organization = COACERVATES
– Predecessors to the first true cells
6. Advanced Coacervates
• Use RNA to make copies =
REPRODUCTION
7. Reproduction  1st cells
• 3.5 BYA
All first cells
• Archaebacteria
• Prokaryotes - “ Before nucleus”
• Anaerobes
8. Archeabacteria - advanced
• 3-2.5 BYA
• Chemoautotrophs
• Photosynthesis by cyanobacteria
releases O2 in atmosphere
9. Oxidizing atmosphere
(21% O2)
•
•
•
•
2.5 BYA
many archeobacteria go extinct
O3 UV shield
O2  Aerobic respiration
10. Aerobic Respiration
• Efficient energy for cells
• New cell design = EUKARYOTIC CELLS
• “advanced” cells with nuclei
11. Eukaryotic cells
• 1.5 BYA
• Theory of Endosymbiosis - Big cells engulf
and incorporate small cells as organelles.
• Remember Dr. Jeon’s Amoeba’s??
•
Archeabacteria  organelles
• Cells are now more complex and diverse.
12. Multicellular Organisms
• 0.57 BYA
• Specialization of cells