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.
I was wondering how the two-way flow of sucrose in phloem works. I understand that in xylem, water moves upwards via capillary action and transpiration pull. However, I'm slightly confused as to how sucrose solution can move two ways (up and down) in the same phloem sieve tube. was wondering how the two-way flow of sucrose in phloem works. I understand that in xylem, water moves upwards via capillary action and transpiration pull. However, I'm slightly confused as to how sucrose solution can move two ways (up and down) in the same phloem sieve tube.