With reference to the process of transpiration in plants, consider the following statements: 1. Plants release water into the air in the form of liquid droplets. 2. This process takes place primarily through the leaves. 3. Transpiration helps in the upward movement of water in the plant. Which of the statements given above are correct?

The correct option is (c). Explanation Transpiration is the physiological process involving the evaporative loss of water from the aerial parts of plants. It is essential for water transport, mineral absorption, and temperature regulation. Statement-wise Analysis - Statement 1 is Incorrect. Transpiration involves the release of water into the atmosphere in the form of water vapor. The process where plants release water in the form of liquid droplets (usually from leaf margins) is known as guttation, which occurs through specialized structures called hydathodes. - Statement 2 is Correct. Transpiration takes place primarily through the stomata, which are minute pores found on the epidermis of leaves. While minor amounts of water loss occur through the cuticle and lenticels, stomatal transpiration accounts for the majority of the process. - Statement 3 is Correct. The evaporation of water from leaves creates a suction force known as transpiration pull. This negative pressure is the primary driving force responsible for the upward movement of water and dissolved minerals from the roots to the upper parts of the plant (ascent of sap). Key Takeaway Transpiration is the loss of water as vapor, which generates the pull required for the upward transport of water. Guttation is the loss of water as liquid droplets.

With reference to the process of… - NCERT Class 6 Science MCQ

NCERT Class 6 Science — Chapter 3: Getting to know plants

mcqmedium

With reference to the process of transpiration in plants, consider the following statements:

Plants release water into the air in the form of liquid droplets.
This process takes place primarily through the leaves.
Transpiration helps in the upward movement of water in the plant.

Which of the statements given above are correct?

NCERT textbook question

From NCERT Science - class 6 · Page 55

Options

A1 and 2 only
B2 only
C2 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (c).

Explanation

Transpiration is the physiological process involving the evaporative loss of water from the aerial parts of plants. It is essential for water transport, mineral absorption, and temperature regulation.

Statement-wise Analysis

Statement 1 is Incorrect. Transpiration involves the release of water into the atmosphere in the form of water vapor. The process where plants release water in the form of liquid droplets (usually from leaf margins) is known as guttation, which occurs through specialized structures called hydathodes.
Statement 2 is Correct. Transpiration takes place primarily through the stomata, which are minute pores found on the epidermis of leaves. While minor amounts of water loss occur through the cuticle and lenticels, stomatal transpiration accounts for the majority of the process.
Statement 3 is Correct. The evaporation of water from leaves creates a suction force known as transpiration pull. This negative pressure is the primary driving force responsible for the upward movement of water and dissolved minerals from the roots to the upper parts of the plant (ascent of sap).

Key Takeaway

Transpiration is the loss of water as vapor, which generates the pull required for the upward transport of water. Guttation is the loss of water as liquid droplets.

Your note

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