Explore this cemetery for graves, information and tombstones for names in Sterling Cemetery in Sterling, Kansas, a Find A Grave Cemetery.
It is estimated that about 50% of the world's oxygen is produced via phytoplankton photosynthesis. The rest is produced via photosynthesis on land by plants. Furthermore, phytoplankton photosynthesis has controlled the atmospheric CO 2 / O 2 balance since the early Precambrian Eon.
What percentage of water is in most living cells? What percentage of the volume of a living cell is water? The exact percentage of water per living cell is dependent on  tissue type. However, it is estimated and accepted that water  accounts for 70% by mass of each cell. 2 people found this useful. Edit.