Question

What is the direction of movement ofsugarsin
(1) Non-multidirectional
(2) Upward
(3) Downward
(4) Bi-directional

Answer 1

Answer:

2) upward { The movement in phloem is multidirectional, whereas, in xylem cells, it is unidirectional (upward) }

Explanation:

The inflow of water increases turgor pressure at the source, causing the movement of water and carbohydrates through the sieve tube elements toward a sugar sink. (Turgor pressure is pressure from the fluid within the plant cell that pushes against the plant cell wall.)

As a sugar sink receives water and carbohydrates, turgor pressure builds. But before the sugar sink can turn into a sugar source, carbohydrates in the sink are actively transported out of the sink and into needy plant cells. As the carbohydrates are removed, the water then follows the solutes and diffuses out of the cell, relieving the pressure

Xylem is involved in the movement of water through the plants from the roots to leaves and sinks mostly are the root or Tuber source hence the direction should be upward acc to me

Answer 2

The direction of movement of sugars in phloem is Bi-directional.

Step by step explanation:

• Phloem transfers organic materials from the source to the sink. Therefore, the usual transport path is downward from the primary source to the central sink and upward direction.
• The direction of mobility of  sugars in the phloem is bi-directional, as it depends on the source-sink relationship that varies in different kinds of plants.

Hence, correct option is 4.