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Byju's Answer
Standard XII
Biology
Long Distance Transport of Water
Xylem helps i...
Question

Xylem helps in translocation of

A
water and mineral salts
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B
organic nitrogen and hormones
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C
organic and inorganic solutes
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D
both a and b
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Solution

The correct option is D both a and b
Higher plants have highly specialised vascular tissues – xylem and phloem. Xylem is associated with translocation of mainly water, mineral salts, some organic nitrogen and hormones from roots to the aerial parts of the plants. While the phloem translocates a variety of organic and inorganic solutes mainly from the leaves to other parts of the plants.

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Q. Xylem is associated with the translocation of:
(i) Water and mineral salts
(ii) Organic nitrogen
(iii) Plant growth regulators
Q.

Identify the correct set of statements related to the movement of substances through vascular tissues.

I. Xylem mainly translocates water, minerals salts and also inorganic solutes.

II. Phloem mainly translocates a variety of organic solutes and also inorganic solutes.

III. Xylem transports substances from roots to aerial parts of the plants.

IV. Phloem transports substances bidirectionally.


Q. Select the correct option:
i. Xylem helps carry water from roots to other parts of plant.
ii. Xylem translocates mineral salts along with descending stream of water.
iii. Transpiration pull is responsible for the translocation of mineral salts in water.
Q. Which of the following statements is/are not correct?
(i) Water and minerals, and food are generally moved by a mass or bulk flow system.
(ii) Bulk flow can be achieved either through a positive hydrostatic pressure gradient or a negative hydrostatic pressure gradient.
(iii) The bulk movement of substances through the conducting tissues of plants is called translocation.
(iv) Xylem translocates organic and inorganic solutes, mainly from roots to the aerial parts of the plants.
(v) Phloem translocates water, mineral salts, some organic nitrogen and hormones, from the leaves to other parts of the plants.
Q. Assertion :Xylem transports water and dissolved mineral salts from the roots to the rest of the plant. Reason: Phloem translocates organic solutes from the leaves to various parts of the plant
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