Cotinine is a byproduct of nicotine, which is found in tobacco. How  long cotinine can stay in your urine depends upon the amount of  tobacco you have smoked and how many yeâ¦ars you have been smoking  for. Therefore, cotinine could stay in your urine for as little as  2 days or as much as 3 months. Answered.
In vascular plants, phloem is the living tissue that carries organic nutrients (known as photosynthate), in particular, sucrose, a sugar, to all parts of the plant where needed.In trees, the phloem is the innermost layer of the bark, hence the name, derived from the Greek word ÏÎ»Î¿Î¹ÏÏ (phloios) meaning bark.n vascular plants, phloem is the living tissue that carries organic nutrients (known as photosynthate), in particular, sucrose, a sugar, to all parts of the plant where needed.
Phloem is used to transport dissolved substances, sap, around the plant, while xylem transports water. The transport system of plants differs from that of mammals in two distinct ways. Plant cells do not need substances as quickly as mammals because they are a lot less active.d. Phloem, and xylem, tissue is arranged so that cells join end to end to form long tubes throughout the plant. The cells that make up the transport system have been modified to allow easier transport through the plant. In xylem tissue, the cells are dead.