I. It is resistant to microorganismsII. It co | vedclass

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(B) The correct answer is $IV$.Heartwood is the central,innermost part of the secondary xylem in old trees. It is dark brown due to the deposition of

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Only $IV$

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(B) The correct answer is $IV$.Heartwood is the central,innermost part of the secondary xylem in old trees. It is dark brown due to the deposition of organic compounds like tannins,resins,oils,gums,aromatic substances,and essential oils. These substances make it hard,durable,and resistant to the attacks of microorganisms and insects. It consists of dead elements with highly lignified cell walls. In contrast,the peripheral part of the secondary xylem is known as sapwood,which is lighter in color and involved in the conduction of water and minerals. Therefore,statement $IV$ (It is the peripheral part) does not describe heartwood.

$I.$ It is resistant to microorganisms
$II.$ It comprises dead elements
$III.$ It comprises highly lignified cell wall
$IV.$ It is the peripheral part
$V.$ It is dark and tough
Which of the above property does not belong to heartwood?

Similar Questions

Select the wrong statements.
$I.$ Primary and secondary phloem gets crushed during secondary growth.
$II.$ During secondary growth,primary xylem remains more or less intact.

The process by which plants become woody is:

Which of the following is not a part of the periderm?

The xylem which is functional in a dicot tree is:

“Sap wood” is otherwise called:

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$I.$ It is resistant to microorganisms$II.$ It comprises dead elements$III.$ It comprises highly lignified cell wall$IV.$ It is the peripheral part$V.$ It is dark and toughWhich of the above property does not belong to heartwood?