Introduction
C3 plants use (3 carbon compound) carbon fixation of air in ONLY the mesophyll cell using RUBP to convert carbon dioxide and ribulose biphosphate into the first stable product made, 3 phosphoglycerate they will consist of two PCR cycles in the mesopyhll and bundle sheath cell. This being a slower process makes the respiration rate much lower. Photorespiration is used in this process to make more H20 available for these C3 plants. They will use most of the water they get through transpiration and will not be able to survive wth lots of heat because rubisco needs plently of oxygen. While C4 plants do not use air to fixate they consist of 4 carbon compounds phosphoenol pyruvate to receive the carbon to produce a stable oxaloacetic acid in the mesophyll cell and bundle-sheath cell therefore making it a faster process than a C3 plant so the losses are low.
Task
This being the photosynthetic pathway of C3 plants which could be Elm, Bluegrass, Wheat, Barley, Potatoes, Sugar Beet, Rice, Oat, Evergreen trees, and Tobacco as such plant, The environmental conditions in which a few are found in could be Barley living in grass or woodlands, in cool or dry climate, Bluegrass taking to shade and tolerance to low temperatures, Tobacco needing light and soil but also seedbeds to cover using hot and cold frames using burned wood and branches for seedlings and young plants, and Wheat living in clay-loam with high phosphorus levels in warm climates (21-24 degrees celsius) with a generous ammount of 12 to 15 inches of water and low humidity to survive. The second photo being a photosynthetic pathway for the c4 plants which would be corn, Sugar Cane, Pigweed, Goose Grass, Crabgrass, Switchgrass, Fourwing Saltbush, Tumbleweed, and Nutgrass while the species environmental conditions of corn need light and moisture preferrably a 1/4 inch a day and warmer temperatures around 68 to 74 degrees fahrenheit, Tumble weed needs wind to survive it is its way of production living in firm soil at 52 to 90 degrees fahrenheit being moisture and drought tolerent, Nutgrass lives in hot and cry places with (thick stem) tubers to protect it from the habitats conditions, Pigweed survive in hot dry habitats high temperatures, low latitudes and solar radiation are best. 
Process
C4 and C3 plants being similar and very different, the stomata being open in the day accepting the same ammount of carbon dioxide each. Using photosynthesis, Carboxylation, the Calvin Benson cycle, C3 acids, C4 and light-dependant and independant reactions each producing glucose. Still C3 plants will have more cycles of carboxylation (one degree and two), PEP,Pi, and starch are the differentiating substances in the C3 plants while C4 plants only have phosphoenol pyvurate . Regeneration and Plasmadesmata in C4 plants are two different processes occuring in the plant and C3 plants will open and close their stomata throughtout the night and day.
Credits
Citations:
Wikipedia. C3 Carbon Fixation. 24 June 2014. http://en.wikipedia.org/wiki/C3_carbon_fixation (25 Sept 14)
Extension. Redroot Pigweed. 25 June 2013. http://www.extension.org/pages/68434/redroot-pigweed-amaranthus-retrofl… (25 Sept 14)
Crops Review. C4 Plants. http://www.cropsreview.com/c4-plants.html (25 Sept 14)
Crops review. C3 Plants. http://www.cropsreview.com/c3-plants.html (25 Sept 14)
Google. https://www.google.ca/search?q=list+of+different+c4+and+c3+plants&espv=… (25 Sept 14)
Wikipedia. Cultivation of Tobacco. (August 2008) http://en.wikipedia.org/wiki/Cultivation_of_tobacco (25 Sept 14)
Ontario. Rough Bluegrass. 13 November 2013. http://www.omafra.gov.on.ca/english/crops/facts/92-054.htm (26 Sept 14)
UCIPM. Russian Thistle Management. April 25, 2014. http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7486.html (26 Sept 14)
Clemson. Environmental Conditions of Corn Growth. 2014. http://www.clemson.edu/extension/rowcrops/corn/guide/environmental_cond…;(26 Sept 14)
Arkive. Nut grass. March, 2011. http://www.arkive.org/nut-grass/cyperus-rotundus/ (26 Sept 14)