A : The oldest layer of sapwood lies just out | vedclass

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(D) The Assertion is incorrect because the oldest layer of sapwood is found near the heartwood,not just outside the vascular cambium. The youngest lay

Vedclass · Accepted Answer

Both Assertion and Reason are incorrect.

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(D) The Assertion is incorrect because the oldest layer of sapwood is found near the heartwood,not just outside the vascular cambium. The youngest layer of sapwood is located just outside the vascular cambium.The Reason is incorrect because sapwood is the peripheral,living part of the secondary xylem,while the central part of the stem is occupied by heartwood (duramen),which is non-conducting and dead.

$A$ : The oldest layer of sapwood lies just outside the vascular cambium.
$R$ : Sapwood contains actively conducting vessels and occupies the central part of the stem.

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$A$ : The oldest layer of sapwood lies just outside the vascular cambium.$R$ : Sapwood contains actively conducting vessels and occupies the central part of the stem.