Answer: Most of Earth's oxygen comes from tiny ocean plants – called phytoplankton – that live near the water's surface and drift with the currents. So, mostly from plants, trees etc...
Hope I helped!
Surface tension is caused by the attraction of the particles in the surface layer by the bulk of the liquid.
Answer:
B. Protein is composed of DNA which is produced in the cell
Explanation:
C is the answer because water and carbon dioxide are left over after and
mitochondria is the thing in the cell that converts everything.
