With reference to "Eucalyptus trees" and wastewater, consider the following statements: 1. They absorb surplus wastewater rapidly. 2. They retain all absorbed water and do not release any vapour into the atmosphere. 3. They are often planted near sewage ponds to absorb surplus wastewater. Which of the statements given above is/are correct?

The correct option is (c). Explanation Eucalyptus trees are fast-growing species known for their extensive root systems and high rates of transpiration. These characteristics make them effective "biological pumps" capable of absorbing large quantities of water from the soil, a property utilized in phytoremediation and wastewater management. Statement-wise Analysis: - Statement 1 is Correct: Eucalyptus trees have a high water demand and absorb surplus wastewater rapidly. Their deep and extensive root systems allow them to uptake significant amounts of water, which helps in lowering the water table in waterlogged areas or managing effluent discharge. - Statement 2 is Incorrect: Plants do not retain all absorbed water. Through the process of transpiration, Eucalyptus trees release pure water vapor into the atmosphere. In fact, they are known for their high transpiration rates, which is the primary mechanism by which they remove water from the soil. - Statement 3 is Correct: Due to their ability to absorb water rapidly, Eucalyptus trees are frequently planted along the boundaries of sewage ponds or wastewater treatment sites. They help absorb surplus wastewater, preventing overflow and reducing the risk of groundwater contamination through leaching. Key Takeaway: Eucalyptus trees act as efficient biological pumps that absorb wastewater rapidly and release it into the atmosphere as pure vapor through transpiration; they are widely used for draining marshy lands and managing sewage effluents.

With reference to "Eucalyptus… - NCERT Class 7 Environment & Ecology MCQ

NCERT Class 7 Environment & Ecology — Chapter 2: Wastewater story

mcqmedium

With reference to "Eucalyptus trees" and wastewater, consider the following statements:

They absorb surplus wastewater rapidly.
They retain all absorbed water and do not release any vapour into the atmosphere.
They are often planted near sewage ponds to absorb surplus wastewater.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 7 · Page 160

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (c).

Explanation

Eucalyptus trees are fast-growing species known for their extensive root systems and high rates of transpiration. These characteristics make them effective "biological pumps" capable of absorbing large quantities of water from the soil, a property utilized in phytoremediation and wastewater management.

Statement-wise Analysis:

Statement 1 is Correct: Eucalyptus trees have a high water demand and absorb surplus wastewater rapidly. Their deep and extensive root systems allow them to uptake significant amounts of water, which helps in lowering the water table in waterlogged areas or managing effluent discharge.
Statement 2 is Incorrect: Plants do not retain all absorbed water. Through the process of transpiration, Eucalyptus trees release pure water vapor into the atmosphere. In fact, they are known for their high transpiration rates, which is the primary mechanism by which they remove water from the soil.
Statement 3 is Correct: Due to their ability to absorb water rapidly, Eucalyptus trees are frequently planted along the boundaries of sewage ponds or wastewater treatment sites. They help absorb surplus wastewater, preventing overflow and reducing the risk of groundwater contamination through leaching.

Key Takeaway:

Eucalyptus trees act as efficient biological pumps that absorb wastewater rapidly and release it into the atmosphere as pure vapor through transpiration; they are widely used for draining marshy lands and managing sewage effluents.

Your note

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