Photosynthesis

These are some plants (fake as you can see), I took a picture of them because plants are among the different organisms that can perform the process of photosynthesis.

Photosynthesis is basically the conversion of sunlight into natural sugars that can later be used in cellular respiration to form ATP, or energy. This process can take place in plants, some forms of bacteria and even some protistans. The process of photosynthesis is often associated with the green pigment called chlorophyll and it releases the oxygen that we humans need to survive.

Sources:
Photosynthesis. maricopa.edu. Retrieved August 26, 2011, from http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookps.html