Are extensions of xylem parenchyme cells into vessels
Are linked to the ascent of sap through xylem vessels
Originate in the lumen of vessels
Characterize the sapwood
A
Are linked to the ascent of sap through xylem vessels
B
Characterize the sapwood
C
Are extensions of xylem parenchyme cells into vessels
D
Originate in the lumen of vessels
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Solution
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Tyloses are the balloon-shaped extension of xylem parenchyma cells of vessels in the heartwood. These structures are mostly found in drought exposed plants or in infected plants wherein they serve to reduce the surface available for transport in the conducting element and thereby acting as morphological defenses.
Therefore, the correct answer is option A.
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