SSC
BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Which best describes the flow of phloem?
|
|
Root to shoot; one direction
|
|
|
Source to sink; two directions
|
|
|
Source to sink; one direction
|
|
|
Root to shoot; two directions
|
Explanation:
Detailed explanation-1: -Hence, the movement of food through the phloem is bi-directional i.e. both in upward and downward directions. The process of food transportation via the phloem requires ATP.
Detailed explanation-2: -The photosynthetically active parts of the plants are referred to as the sources. The areas of active growth and the areas of storage are referred to as the sinks. The phloem elements are loaded at these sites. The phloem elements are unloaded at these sites.
There is 1 question to complete.