Which types of trees grow inwards and fibrous mass is seen in their longitudinal sections?

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SSC JE Civil 06 Jun 2024 Shift 1 Official Paper - 1
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  1. Conifers
  2. Deciduous
  3. Endogenous trees
  4. Exogenous trees

Answer (Detailed Solution Below)

Option 3 : Endogenous trees
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Explanation:
  • Endogenous Trees: These trees grow inwards, and their structure is characterized by fibrous masses when viewed in longitudinal sections. Unlike exogenous trees, which grow by adding layers of growth rings outward, endogenous trees grow by adding new fibrous tissues internally.

  • Common examples of endogenous trees include bamboo, palms, and cane.

  • Conifers: These are exogenous trees, typically evergreen, and they grow outwards with concentric growth rings. Examples include pine, spruce, and fir.

  • Deciduous Trees: These are also exogenous trees, which shed their leaves annually. They also grow outwards with concentric rings. Examples include oak, maple, and birch.

  • Exogenous Trees: These trees grow outwards by adding layers or rings each year. The growth is concentric, with the new layers forming on the outside of the previous year's growth. This category includes most timber trees used in construction, such as oak and pine.

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