SELECT * FROM question_mgmt as q WHERE id=6049 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=11 AND subId=16 AND chapterId=471 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 7th science Transportation in Animals and Plants choose the correct option a in plants water

Question:

Choose the correct option:

(a) In plants, water is transported through
(i) xylem                  (ii) phloem
(iii) stomata             (iv) root hair

(b) Water absorption through roots can be increased by keeping the plants
(i) in the shade
(ii) in dim light
(iii) under the fan
(iv) covered with a polythene bag

Answer:

(a); (i) Xylem
The water and minerals from soil enters the plant through the roots and then pass into the xylem, then from this the dissolved mineral and water moves in the upward direction that occurs from the soil to the uppermost leaves. This upward movement of minerals and water against the gravitational force through the xylem is known as ascent of sap. Xylem tissue consists of living and non-living cells; and non- living cells consists of tracheary elements: tracheids and vessel elements.

(b); (iii) Under the fan
Water absorption occurs through the roots can be enhanced by keeping the plants under the fan because of the transpiration process is boosted. Higher vapour pressure differences between leaf air spaces and the external air increases the transpiration rate.


SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='11' AND subId='16' AND ex_no!=0 AND status=1 and id!=6049 ORDER BY views desc, last_viewed_on desc limit 0,10
SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='11' AND subId='16' AND ex_no!=0 AND status=1 and id!=6049 ORDER BY last_viewed_on desc limit 0,10

Comments

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  • 4 months ago

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  • Answered by Ekta Mehta
  • 4 months ago

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  • Answered by Ekta Mehta
  • 4 months ago

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