What is/are true about heartwood?I. It does n | vedclass

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(B) Heartwood,also known as $duramen$,is the central,non-functional part of the secondary xylem.Statement $I$ is true because heartwood does not condu

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$I$ and $IV$

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(B) Heartwood,also known as $duramen$,is the central,non-functional part of the secondary xylem.Statement $I$ is true because heartwood does not conduct water due to the deposition of organic compounds.Statement $II$ is false because alburnum refers to sapwood,not heartwood.Statement $III$ is false because heartwood is dark in colour but very hard and durable,not soft.Statement $IV$ is true because the tracheary elements in heartwood are filled with tannins,resins,oils,gums,and aromatic substances,which make it resistant to microbial attack.

What is/are true about heartwood?
$I.$ It does not help in water conduction.
$II.$ It is also called alburnum.
$III.$ It is dark in colour but very soft.
$IV.$ It has tracheary elements,which are filled with tannin,resin,etc.

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What is/are true about heartwood?$I.$ It does not help in water conduction.$II.$ It is also called alburnum.$III.$ It is dark in colour but very soft.$IV.$ It has tracheary elements,which are filled with tannin,resin,etc.