Well, it's obvious, because without a transport system, cells wouldn't have the nutrients and things they needed!! And waste wouldn't be able to circulate out of cells.
True. Think if ice cubes in the freezer. They shrink due to sublimation. <span />
Water is warmed by the sun and is evaporated. It is then cooled down and condensed. Finally, it is brought back to Earth in the form of water droplets (Rain)
I hope it helps!^^ May the power of unicorns be with you!
Answer:
basically every living thing breathes oxygen O2 and exhales carbon dioxide CO2
Explanation:
So orcas use O2 and produce then CO2.
