AP BIOLOGY

Detailed explanation-1: -Sugars produced in sources, such as leaves, need to be delivered to growing parts of the plant via the phloem in a process called translocation, or movement of sugar.

Detailed explanation-2: -The sugar and other organic molecules are transported through the plant by means of a special layer of tissue called phloem. Phloem is composed of living cells that transport a water solution of sugars that we commonly call sap.

Detailed explanation-3: -Answer: The mass flow hypothesis states that a never-ending flow of water and nutrients between both the source (where sugars are created) and the sink causes the translocation of glucose and other sugars inside the phloem (where sugars are utilized).

Detailed explanation-4: -Mass flow is the movement of dissolved nutrients into a plant as the plant absorbs water for transpiration. The process is responsible for most transport of nitrate, sulfate, calcium and magnesium. Diffusion is the movement of nutrients to the root surface in response to a concentration gradient.