Post on 02-Jan-2016
Goal 3.05b: Origins and History of Life
Roots:
Endo = withinSym = sameGeo = earthPara = aroundPrim = first
scrapetv.com
Earth formed about 4.6 billion years ago.
Disc. Ed. Begin here and also show “volcanoes, cosmic rain, and extremophiles” http://player.discoveryeducation.com/index.cfm?guidAssetId=DC842144-801C-45DB-8A2A-C4F06F7A8BFC
First forms of LIFE arose 3.5 billion years ago.
trendsupdates.com
msnbc.msn.com
What was Early Earth like?...BAD!!!
Atmosphere:Methane, CO2, water, nitrogen, hydrogen, etc.
No OXYGEN!
Miller and Urey experiment showed that life could have formed out of the simple compounds present during early Earth.
Produced Organic Compounds
commons.wikimedia.org
Proteinoid Microsphere = structure similar to cells
Semipermeable
membrane
Energy Storage!
No DNA or RNA, so NOT cells.
May have evolved into
cells.
biologiateorica.it
PRIMITIVE ORGANISMS!
NO OXYGEN?...NO PROBLEM!ANAEROBIC RESPIRATION
xenotechresearch.com
personal.georgiasouthern.edu
Bacteria capable of photosynthesis emerges.
6CO2 6H2O C6H12O6 6O2sunenergy
+ ++
Oxygen
!
Ozone
Ozone layer trapped theOxygen from photosynthesis and created a new kind of atmosphere.
Many organisms could not adapt to oxygenated air and went extinct. Others evolved into oxygen breathing species.
envis.tropmet.res.in
PHOTOSYNTHESIS!
Prokaryotic organisms appeared about 2 billion years ago.
ENDOSYMBIONT Theory
Some prokaryotic cells began evolving internal cell membranes.
Result = primitive eukaryotic cell.
Some prokaryotic cells entered the eukaryotic cells and developed a
symbiotic relationship with the eukaryotic cell.
The inner prokaryotic cells evolved into cell organelles.
Endosymbiont Theory
Sexual Reproduction brought about variation and evolution into modern cells.
virtuallaboratory.colorado.edu
Origins of humankind (interactive)/ Riddle of the Bones (interactive) / Designer Babies? (interactive) http://www.pbs.org/wgbh/evolution/humans/index.html
Tape both of your thumbs to your hands like this…
Perform the following activities as instructed using the materials provided:
1. Open the jar and pour the contents onto your desk.
2. Pick up the penny and place it inside the ziplock bag. Close the bag.
3. Stick the tack into the cardboard then remove it.
4. Write your name in the center of the paper.
5. Now cut your name out of the paper.
6. Paperclip the cut piece of paper (with your name) to the remaining piece of paper.
7. Staple the paper-clipped papers to a sheet of notebook paper.
8. Remove the paperclip and place the stapled papers into the homework box. This will insure you receive an activity grade.
9. Open the door to the work room then close it back gently.
10. Place the tack, the penny and the paper clip into the plastic jar and close it.
You may need a partner to help you tape your thumbs.
clker.com
Speciation = formation of a new species
Behavioral Isolation = isolation due to differences in BEHAVIORS.http://news.nationalgeographic.com/news/2007/02/070221-riflebird-
video.html
Geographic Isolation = isolation due to differences in LOCATIONS.http://bcs.whfreeman.com/thelifewire/content/
chp24/2402002.html
astadnik.wordpress.com