AP BIOLOGY

Detailed explanation-1: -Xylem transports water and mineral salts from the roots up to other parts of the plant, while phloem transports sucrose(sugar) and amino acids between the leaves and other parts of the plants.

Detailed explanation-2: -Phloem transports sugars and amino acids dissolved in water.

Detailed explanation-3: -Phloem transports sucrose and amino acids up and down to the plant.

Detailed explanation-4: -The sucrose is transported around the plant in phloem vessels. It needs to be able to reach all cells in the plant so that the sucrose can be converted back into glucose for respiration. The movement of sucrose and other substances like amino acids around a plant is called translocation .

Detailed explanation-5: -Amino acids are transported between different organs through both xylem and phloem. This redistribution of nitrogen and carbon requires the activity of amino acid transporters in the plasma membrane. In addition, amino acids can be taken up directly by the roots.