Question

The movement of molecules in phloem is

• A. Unidirectional.
• B. Bidirectional.
• C. Non-directional.
• D. Sometimes unidirectional and sometimes bidirectional.

Answer 1

The correct option is B Bidirectional.

Phloem is responsible for transport of food and minerals. Food synthesized in photosynthetic parts is translocated to nonphotosynthetic parts through the phloem. Phloem translocates organic substances and inorganic solutes first from leaves to all other parts of the plant and storage organs. Storage organs re-export organic nutrients to those parts which require the same as newly formed leaves and fruits i.e., it is bidirectional.

Thus, the correct answer is option B.