AP BIOLOGY

Detailed explanation-1: -Phloem is a complex permanent tissue that is present in all vascular plants. Phloem consists of various elements-phloem parenchyma, phloem fibers, companion cells, and sieve tubes. The transportation of food in plants through phloem is bidirectional i.e., in both upward and downward directions.

Detailed explanation-2: -phloem, plant vascular tissue that conducts foods made in the leaves during photosynthesis to all other parts of the plant. Phloem is composed of various specialized cells called sieve elements, phloem fibres, and phloem parenchyma cells.

Detailed explanation-3: -Final Answer: the movement of food in phloem is called translocation.

Detailed explanation-4: -The two primary vascular tissues are xylem, which transports water and dissolved minerals from the roots to the leaves, and phloem, which conducts food from the leaves to all parts of the plant.

Detailed explanation-5: -Phloem transport is bidirectional because sucrose gets accumulated in the phloem tissue and absorbs water creating a high turgor pressure.