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In old trees, central dark coloured, non-conducting part of secondary xylem is referred to as
- a)heartwood
- b)sapwood
- c)softwood
- d)hardwood
Correct answer is option 'A'. Can you explain this answer?
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In old trees, central dark coloured, non-conducting part of secondary ...
Understanding Heartwood
Heartwood is a vital component in the anatomy of old trees, specifically related to the secondary xylem. Here’s an in-depth explanation of heartwood:
Definition of Heartwood
- Heartwood is the central, dark-colored part of the secondary xylem in trees.
- Unlike other parts of the tree, heartwood is primarily non-conducting and does not participate in the transport of water and nutrients.
Formation of Heartwood
- As trees age, the innermost layers of the xylem transition from sapwood to heartwood.
- This transformation involves the accumulation of various substances such as resins, tannins, and oils, which contribute to its darker color and density.
Functions of Heartwood
- While heartwood is non-conductive, it serves important structural functions:
- Provides strength and stability to the tree.
- Acts as a reservoir for nutrients and protective compounds.
- Contributes to the overall durability of the tree, making it more resistant to decay and insect attacks.
Distinction from Sapwood
- In contrast to heartwood, sapwood is the outer layer of xylem that is active in conducting water and nutrients from the roots to the leaves.
- Sapwood is generally lighter in color and is vital for the tree's physiological functions.
In summary, heartwood is essential for the structural integrity and longevity of trees, making option 'A' the correct answer for the question regarding the central dark-colored, non-conducting part of secondary xylem.
Heartwood is a vital component in the anatomy of old trees, specifically related to the secondary xylem. Here’s an in-depth explanation of heartwood:
Definition of Heartwood
- Heartwood is the central, dark-colored part of the secondary xylem in trees.
- Unlike other parts of the tree, heartwood is primarily non-conducting and does not participate in the transport of water and nutrients.
Formation of Heartwood
- As trees age, the innermost layers of the xylem transition from sapwood to heartwood.
- This transformation involves the accumulation of various substances such as resins, tannins, and oils, which contribute to its darker color and density.
Functions of Heartwood
- While heartwood is non-conductive, it serves important structural functions:
- Provides strength and stability to the tree.
- Acts as a reservoir for nutrients and protective compounds.
- Contributes to the overall durability of the tree, making it more resistant to decay and insect attacks.
Distinction from Sapwood
- In contrast to heartwood, sapwood is the outer layer of xylem that is active in conducting water and nutrients from the roots to the leaves.
- Sapwood is generally lighter in color and is vital for the tree's physiological functions.
In summary, heartwood is essential for the structural integrity and longevity of trees, making option 'A' the correct answer for the question regarding the central dark-colored, non-conducting part of secondary xylem.
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In old trees, central dark coloured, non-conducting part of secondary ...
Heartwood (duramen) is the central wood of an old stem. It is dark coloured part of secondary xylem. Living cells are absent here. The tracheary elements are plugged by tyloses and have depositions of tannins, resins, gums, etc. Heartwood is heavier. It is more durable due to its little susceptibility to the attack of pathogens and insects. The outer or peripheral portion of the trunk is soft and lighter in colour. It performs the functions of conduction of water and minerals and is known as sapwood or alburnum.
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In old trees, central dark coloured, non-conducting part of secondary xylem is referred to asa)heartwoodb)sapwoodc)softwoodd)hardwoodCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In old trees, central dark coloured, non-conducting part of secondary xylem is referred to asa)heartwoodb)sapwoodc)softwoodd)hardwoodCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In old trees, central dark coloured, non-conducting part of secondary xylem is referred to asa)heartwoodb)sapwoodc)softwoodd)hardwoodCorrect answer is option 'A'. Can you explain this answer?.
In old trees, central dark coloured, non-conducting part of secondary xylem is referred to asa)heartwoodb)sapwoodc)softwoodd)hardwoodCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In old trees, central dark coloured, non-conducting part of secondary xylem is referred to asa)heartwoodb)sapwoodc)softwoodd)hardwoodCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In old trees, central dark coloured, non-conducting part of secondary xylem is referred to asa)heartwoodb)sapwoodc)softwoodd)hardwoodCorrect answer is option 'A'. Can you explain this answer?.
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