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. The points of sugar delivery, such as roots, young shoots, and developing seeds, are called sinks.

Detailed explanation-2: -The mechanism by which sugars are transported through the phloem, from sources to sinks, is called pressure flow. At the sources (usually the leaves), sugar molecules are moved into the sieve elements (phloem cells) through active transport.

Detailed explanation-3: -Phloem is composed of living cells that transport a water solution of sugars that we commonly call sap. This movement is modeled by the pressure-flow theory, a part of which is that the sugar-containing fluid is moved through sieve tubes by fluid pressure.

Detailed explanation-4: -Phloem is a vascular tissue helps in the transportation of food. The end product of photosynthesis is glucose [C6H12O6] synthesized in leaves and transported to the various storage organs like flowers, fruits, seeds and tubers etc.

Detailed explanation-5: -Phloem moves sugar that the plant has produced by photosynthesis to where it is needed for processes such as: growing parts of the plant for immediate use. storage organs such as bulbs and tubers.