Statement-1: Heartwood is more durable and re | vedclass

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Question

(B) Heartwood (duramen) is the central,darker part of the secondary xylem that has ceased to conduct water and minerals.It becomes durable and resista

Vedclass · Accepted Answer

Statement-$1$ is true,Statement-$2$ is true. Statement-$2$ is the correct explanation of Statement-$1$.

Vedclass · Answer

(B) Heartwood (duramen) is the central,darker part of the secondary xylem that has ceased to conduct water and minerals.It becomes durable and resistant to microbial and insect attacks due to the deposition of organic substances such as oils,aromatic compounds,gums,resins,tannins,and phenols in the vessels and tracheids.Sapwood (alburnum) is the peripheral,lighter-colored part of the secondary xylem that is involved in the conduction of water and minerals.Since Statement-$2$ explains the chemical reason behind the durability mentioned in Statement-$1$,Statement-$2$ is the correct explanation of Statement-$1$.

Statement-$1$: Heartwood is more durable and resistant to the attacks of microorganisms and insects compared to sapwood.
Statement-$2$: Heartwood contains organic compounds like oils,aromatic substances,gums,resins,tannins,and phenols.

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Statement-$1$: Heartwood is more durable and resistant to the attacks of microorganisms and insects compared to sapwood.Statement-$2$: Heartwood contains organic compounds like oils,aromatic substances,gums,resins,tannins,and phenols.