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Question

The movement of water in plants takes place in


A

Upward direction

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B

Downward direction

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C

Both upward and downward directions

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D

None of these

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Solution

The correct option is A

Upward direction


The correct option is A.

Explanation of correct option:

Water is essential for the plants and therefore absorbed through the roots and transported in the upward direction to various parts of the plant body. It requires special vascular tissues called xylem tissues.

The movement of water:

  1. Absorbed by roots hairs.
  2. Move to Xylem tissues through either symplast (continuous passage formed by protoplasmic components of the cells connected by plasmodesmata) or apoplast (consist of intercellular spaces and protoplasm lacking structures like cell wall) pathway.
  3. These conductive or vascular tissues take water to the leaves and other aerial parts.

Explanation of incorrect options:

Option B: Water does not go through downward directions as it is absorbed from the soil and move due to water potential gradient which means it moves from the high concentration region to the low water concentration region.

Option C: Phloem vessels are the structures that are specialized to transport organic substances and other photosynthetic products in both upward and downward directions.

The movement of water in plants takes place in the upward direction.


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