Answer:
They use them so that they can see what type of organisms live there.
Explanation:
The carbon atom can go to the plants on the Land.
Neither, humans don't have an estrous cycle, instead the females have a menstrual cycle.
Answer:
Release energy for plant growth
Explanation:
Photosynthesis equation:
6CO2+6H2O -> C6H12O6+O2
The plant is using that CO2 (carbon dioxide) and H2O (water) to build its structure, grow, develop itself!