Who thought a sun tan could feed the world! :)

Leslie
1.What hook does the author use to capture your attention?
I feel that the author (Mitch Leslie) uses the fact that the world as we know it would not exist if it where not for the process of photosynthesis. By bring light the this incredible truth he is then able to explain the process in depth and with a contextual understanding of how this historical past directly effects us now. He also makes the point that photosynthesis could be one of the last monumental natural inventions in our environment still today. (Leslie, 2009)
2. How could you adapt this hook in your own case study?
I believe that I could adapt this information and hook to my case study by providing the evidence on how this earth became livable for the first signs of life which then made way for the first dinosaurs.
3. Let’s start with the basics. What’s photosynthesis?
The process of Photosynthesis provides plants with the needed sugars to grow and reproduce. The process first starts with water and carbon-dioxide coming together, these components along with chlorophyll become electrically charged to make a sugar while at the same time releasing oxygen as a by produce of this process. So the plants grow bigger and the planet receives valuable oxygen supplies.
4. How does photosynthesis make the Earth livable for our ecosystem?
The process of photosynthesis provides the needed oxygen gas to create and maintain a o-zone layer providing the much needed protection from the sun’s ultra-violet rays, With out an o-zone layer the surface of the earth would grow to hot for any life to live. Another reason way photosynthesis is so needed is because it’s at the bottom of the food chain, if there were no plants then there would be NO food period. Thus it is a much for life to be present as we now it today.
5.What chemical was the basis of the earliest photosynthesizing microbes? Of most
Photosynthesizing organisms alive today?
The suspected earliest chemical was RuBisCO, this enzyme eats Carbon-dioxide and turns it into sugars. Most oxygen producing photosynthesis now eats carbon 12 and water.
6.What role does chlorophyll play in photosynthesis?
The chlorophyll’s role in photosynthesis is to absorb sun light and then lend its energy to the production of electrons; with out chlorophyll photosynthesis will not occur.
7.What was the great oxidation event? How do we recognize it in the fossil record?
The great oxidation event was when photosystem I and photosystem II came together to form the now common photosynthesis, The photosystem II has the ability to ripe the oxygen away from water molecules during its process, thus providing the earth with a study flow of oxygen. This is seen in the fossil records when scientist discover areas of fossil with a lower carbon 13 contain, showing that oxygenation had take place millions of years ago.
Zimmer
1.What hook does the author use to capture your attention?
Zimmer like many other times in this writing uses a unrealistic truth about our true origins and similarities to those species around us that seem to be nothing like us. In this case he uses the example of how much our cells are alike those of a toadstool.

2.How could you adapt this hook in your own case study?
This hook perhaps does not offer a direct correlation to my case study but does cause me to think about what ways I could cleverly tie our own existence to the dinosaurs and then the K-T extinction.
3.What are eukaryotes?
Eukaryotes are a group of species’ that have cells that carry a nucleus in the middle of them, and with in the nucleus there are large bundles of DNA.
4.What are mitochondria? How did they evolve?
Mitochondria are the pockets (Cells structure), or storage parts with in a cell that stores fuel for the cell to grow and reproduce. They evolved from the original bacterial passengers with in a cell.
5.What is the “hydrogen hypothesis”?
This hypothesis goes on to say something of the fact that two different cell types came together to form the first eukaryotes.
6.Briefly compare the three domain hypothesis to the eocyte hypothesis.
Do not Understand this…..Equals very frustrated!!! I will seek professors helps.

Sources

-Leslie, M. (2009, March 6th). On the origins of photosynthesis. Sciencemag, 323, Retrieved from www.sciencemag.org
- Zimmer, C. (2009, August 7th). On the origins of eukaryotes. Sciencemag, 325, Retrieved from www.sciencemag.org