You would want this observation to be in an area with a lot of biotic and abiotic factors, so the best place for it is an ecosystem.
Explanation:
Water is the most abundant substance in the body. An average healthy adult is 45 to 75 percent water. Percent of water declines with age. Males have more body water than females.
I think the answer is frequency if I remember correctly
Because we have carbon in the ground in the air and every were else
The cell actually divides in Cytokinesis.