I believe that present day was a theory that became a evolution developed because it was a historical event involved
Well, photosynthesis is actually simple, 6 CO2 + 12 H2O → C6H12O6 + 6 O2 + 6 H2O So Carbon + water --> Glucose + Oxygen + Water
Cells are the most simple level of organization, as tissues contain cells, organs contain tissues and systems contain organs, so R would be your answer.
For a fish to be buoyant, or float, it must displace less water or the same amount of water as its own body mass. ... Many fish use swim bladders to help them with quick depth changes. These bladders fill with air to help fish rise or release air so fish can sink, often in conjunction with forward movement.
