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 a specialised tissue for food transport in higher plants. Phloem cells mainly transport sucrose along pressure gradients generated by osmosis. This phenomenon is called translocation. Phloem consists of two cell types, the sieve tubes and the intimately associated companion cells.ell types [edit]. 1  Parenchyma cells are living cells that have functions ranging from storage and support to photosynthesis and phloem loading (transfer cells). 2  Collenchyma cells â collenchyma cells are alive at maturity and have only a primary wall.