Plants make their own food by a process called Photosynthesis. ... Photosynthesis is done with the help of carbon-dioxide, water, and sunlight. The end products of photosynthesis are oxygen, which the plants release, and carbohydrates, which become the plants' source of energy
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.
Topoisomerase is the enzyme that can be added to correct the untwisting that is led to strain ahead of the replication fork.
