Consider the following statements regarding the transport of materials in plants: 1. Water and minerals are primarily absorbed by the leaves. 2. They are transported to the leaves through a continuous path of vessels. 3. The vessels form a continuous path from the roots to the leaves. Which of the statements given above are correct?

The correct option is (c). Explanation Vascular plants possess specialized conducting tissues for the transport of materials. The xylem is responsible for the transport of water and minerals, while the phloem transports organic nutrients (food). This vascular system forms a continuous network throughout the plant body. Statement-wise Analysis - Statement 1 is Incorrect. Water and minerals are primarily absorbed by the roots, not the leaves. The root hair cells increase the surface area of the root system, facilitating the absorption of water and dissolved mineral nutrients from the soil through diffusion and osmosis. Leaves are primarily responsible for photosynthesis and transpiration. - Statement 2 is Correct. Once absorbed by the roots, water and minerals are transported upward to the leaves and other parts of the plant through a specialized tissue called the xylem. The xylem consists of vessels and tracheids which serve as the conduits for this transport. - Statement 3 is Correct. The xylem vessels and tracheids form a continuous, interconnected system of tubes. This network runs from the roots, up through the stem and branches, and into the leaves, ensuring a steady supply of water and minerals to all aerial parts of the plant. Key Takeaway Xylem tissue forms a continuous channel connecting roots to leaves for the unidirectional transport of water and minerals, whereas roots are the primary site for absorption from the soil.

Consider the following statements regarding the transport of materials in plants:… - NCERT Class 7 Science MCQ

NCERT Class 7 Science — Chapter 1: Nutrition in plants

mcqmedium

Consider the following statements regarding the transport of materials in plants:

Water and minerals are primarily absorbed by the leaves.
They are transported to the leaves through a continuous path of vessels.
The vessels form a continuous path from the roots to the leaves.

Which of the statements given above are correct?

NCERT textbook question

From NCERT Science - class 7 · Page 2

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

Vascular plants possess specialized conducting tissues for the transport of materials. The xylem is responsible for the transport of water and minerals, while the phloem transports organic nutrients (food). This vascular system forms a continuous network throughout the plant body.

Statement-wise Analysis

Statement 1 is Incorrect. Water and minerals are primarily absorbed by the roots, not the leaves. The root hair cells increase the surface area of the root system, facilitating the absorption of water and dissolved mineral nutrients from the soil through diffusion and osmosis. Leaves are primarily responsible for photosynthesis and transpiration.
Statement 2 is Correct. Once absorbed by the roots, water and minerals are transported upward to the leaves and other parts of the plant through a specialized tissue called the xylem. The xylem consists of vessels and tracheids which serve as the conduits for this transport.
Statement 3 is Correct. The xylem vessels and tracheids form a continuous, interconnected system of tubes. This network runs from the roots, up through the stem and branches, and into the leaves, ensuring a steady supply of water and minerals to all aerial parts of the plant.

Key Takeaway

Xylem tissue forms a continuous channel connecting roots to leaves for the unidirectional transport of water and minerals, whereas roots are the primary site for absorption from the soil.

Your note

More from Chapter 1: Nutrition in plants

Consider the following statements regarding the relationship between legumes and Rhizobium: 1. It is an example of a symbiotic relationship. 2. The bacteria provide food and shelter to the plant. 3. The plant provides nitrogen to the bacteria. Which of the statements given above is/are correct?

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With reference to saprotrophic nutrition, consider the following statements: 1. It is a mode of nutrition where organisms take in nutrients from dead and decaying matter. 2. Fungi ingest dead matter directly without secreting digestive juices. 3. All fungi are harmful and cause spoilage of food and diseases. Which of the statements given above is/are correct?

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Consider the following statements about the transport system in plants: 1. Roots absorb water and minerals from the soil. 2. The transport vessels are restricted to the roots and do not reach the stem. 3. The vessels form a continuous network reaching the leaves. Which of the statements given above is/are correct?

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Which one of the following crops is a legume capable of symbiotic nitrogen fixation via Rhizobium?

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Consider the following statements about the digestive process in saprotrophs: 1. They digest food externally before ingestion. 2. They secrete digestive juices inside their bodies. 3. They absorb nutrients in solution form. Which of the statements given above is/are correct?

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