The following paragraph is related to absorption of water from the soil. Complete the following paragraph by selecting the correct word from those in the box. You may use the term only once.

exosmosis, hypertonic, osmosis, isotonic, hypotonic, cortical, endosmosis

Water enters the root hair from the soil by the process of . This is because the solution in the soil is , whereas the cell sap in the root hair cell is . The water then passes through the cells by cell to cell and reaches the xylem of the root.

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Solution

Water enters the root hair from the soil by the process of endosmosis. This is because the solution in the soil is hypotonic whereas the cell sap in the root hair cell is hypertonic. The water then passes through the cortical cells by cell to cell osmosis and reaches the xylem of the root.

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The following paragraph is related to absorption of water from the soil. Complete the paragraph by selecting the correct word from those given below. You may use a term only once.

channel xylem opposite endodermis cortex surface area soil particles roots water

__________can enter plants through entire surface of plant body. However, the bulk of water is absorbed by land plants through the __________. Root hairs are in contact with__________. These provide a large __________ for water absorption. Absorbed water is transported to the__________ and endodermis. Internal to the__________ is a single layer of pericycle. The protoxylem elements of xylem lie in __________to the pericycle. This way a direct__________ is formed for the passage of water from the root hair cells to the __________.

Q. (i) How is root hair adapted for the absorption of water from the soil?
(ii) What part is played by
(a) the cell wall?
(b) the cytoplasm in the uptake of water into the root hair?
(iii) What would happen to the root hair of a potted plant if the soil was watered with an extremely concentrated solution of sodium chloride?

Name the following:

(a) The condition of a cell placed in a hypotonic solution.

(b) The process by which intact plants lose water in the form of droplets from leaf margins.

(d) The tissue concerned with upwards conduction of water in plants.

(e) The term for the inward movement of solvent molecules through the plasma membrane of a cell.

(f) The process by which molecules distribute themselves evenly within the space they occupy.

(g) The pressure which is responsible for the movement of water molecules across the cortical cells of the root.

The following paragraph is related to the absorption of water from the soil. Complete the following paragraph by selecting the correct word from those given in the box. You may use the term only once.

exosmosis, hypertonic, osmosis, isotonic, hypotonic, cortical, endosmosis

Water enters the root hair from the soil by the process of _______. This is because the solution in the soil is _______, whereas the cell sap in the root hair cell is _______. The water then passes through the _______ cells by cell to cell _______ and reaches the xylem of the root.

Absorption of minerals by the epidermal cells of root and root hair causes the water to enter from surrounding soil into roots. It further reaches the root xylem. Thus, due to a continuous uptake of water by root cells, a water pressure is created in the root xylem. This pressure is called as________

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Osmosis

Standard X Biology

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