271432
Assertion: In open vascular bundles, cambium is present.
Reason: In monocot stem, cambium is present.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Collateral vascular bundles have the xylem pointing towards the inner side of the phloem. In the same way in monocots, cambium is absent. Collateral vascular bundles are present in stems and leaves of angiosperms and gymnosperms.
Anatomy of Flowering Plants
271433
Assertion: In angiosperms, the conduction of water is more efficient because their xylem has vessels.
Reason: Conduction of water by vessel elements is an active process with energy supplied by xylem parenchyma, rich in mitochondria.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Xylem is the water conducting tissue. It consists of living cells like parenchyma and dead cells like tracheary elements.
Anatomy of Flowering Plants
271434
Assertion: Vessels are more efficient for water conduction as compared to tracheids.
Reason: Vessels are dead lignified.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) Vessels are more efficient for water conduction as compared to tracheids. Vessels resemble tracheids very much in structure and function. But unlike tracheids these are like long tubes arranged in vertical row formed of cylindrical cells arranged to end with their end walls completely dissolved. These are also dead and lignified.
271432
Assertion: In open vascular bundles, cambium is present.
Reason: In monocot stem, cambium is present.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Collateral vascular bundles have the xylem pointing towards the inner side of the phloem. In the same way in monocots, cambium is absent. Collateral vascular bundles are present in stems and leaves of angiosperms and gymnosperms.
Anatomy of Flowering Plants
271433
Assertion: In angiosperms, the conduction of water is more efficient because their xylem has vessels.
Reason: Conduction of water by vessel elements is an active process with energy supplied by xylem parenchyma, rich in mitochondria.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Xylem is the water conducting tissue. It consists of living cells like parenchyma and dead cells like tracheary elements.
Anatomy of Flowering Plants
271434
Assertion: Vessels are more efficient for water conduction as compared to tracheids.
Reason: Vessels are dead lignified.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) Vessels are more efficient for water conduction as compared to tracheids. Vessels resemble tracheids very much in structure and function. But unlike tracheids these are like long tubes arranged in vertical row formed of cylindrical cells arranged to end with their end walls completely dissolved. These are also dead and lignified.
271432
Assertion: In open vascular bundles, cambium is present.
Reason: In monocot stem, cambium is present.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Collateral vascular bundles have the xylem pointing towards the inner side of the phloem. In the same way in monocots, cambium is absent. Collateral vascular bundles are present in stems and leaves of angiosperms and gymnosperms.
Anatomy of Flowering Plants
271433
Assertion: In angiosperms, the conduction of water is more efficient because their xylem has vessels.
Reason: Conduction of water by vessel elements is an active process with energy supplied by xylem parenchyma, rich in mitochondria.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Xylem is the water conducting tissue. It consists of living cells like parenchyma and dead cells like tracheary elements.
Anatomy of Flowering Plants
271434
Assertion: Vessels are more efficient for water conduction as compared to tracheids.
Reason: Vessels are dead lignified.
1 Both (A) and (R) are correct but (R) is not the correct explanation of (A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both (A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) Vessels are more efficient for water conduction as compared to tracheids. Vessels resemble tracheids very much in structure and function. But unlike tracheids these are like long tubes arranged in vertical row formed of cylindrical cells arranged to end with their end walls completely dissolved. These are also dead and lignified.
