Question

question 50 of 50
which of the following describes the role of phloem in a vascular plant?
a. a two - way flow of water and carbohydrates from chloroplasts
b. a transfer of hormones and sugar solution to the roots
c. a one - way flow of protein and carbohydrates to the leaves
d. a transfer of water and nutrients upward from the soil

Explanation:

Phloem in vascular plants is responsible for the transport of organic compounds (like carbohydrates) and water. It has a two - way flow. For example, carbohydrates made in the leaves (where chloroplasts are present for photosynthesis) can be transported to other parts of the plant (like roots for storage or growth) and also, in some cases, substances can move in the reverse direction (e.g., when a plant is mobilizing stored reserves). Option B is incorrect as phloem's main role is transport, not just transfer from chloroplasts in a limited sense. Option C is wrong because it's not a one - way flow of just protein and sugar solution to roots. Option D describes the role of xylem (upward transport of water and nutrients from soil), not phloem.

Answer:

A. A two - way flow of water and carbohydrates from chloroplasts