Wood Structure and Function
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Questions and Answers

What is the primary function of sap wood in woody plants?

  • To conduct water and nutrients (correct)
  • To store nutrients for future growth
  • To provide structural support to the plant
  • To protect the plant from external damage

What term is used to describe wood that has ceased conducting functions?

  • Cambium
  • Phloem
  • Heart wood (correct)
  • Cortex

How does heart wood compare to sap wood in terms of durability?

  • Heart wood is more resistant to microbial attack than sap wood (correct)
  • Heart wood is less resistant to decay than sap wood
  • Heart wood decays faster than sap wood
  • Heart wood has no significant differences in durability compared to sap wood

What typically happens to the vessels of sap wood after a few years?

<p>They deteriorate and become non-functional (C)</p> Signup and view all the answers

Why does heart wood often appear darker than sap wood?

<p>It is filled with substances that preserve the wood (C)</p> Signup and view all the answers

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Flashcards

Sapwood

The active, living wood in a tree, responsible for transporting water and nutrients.

Heartwood

The inactive, darker inner wood in a tree, no longer transporting water and nutrients.

Heartwood Formation

The process by which the vessels of wood become filled with substances that prevent decay.

Heartwood Deposits

The substances that accumulate in heartwood, making it darker and resistant to decay.

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Heartwood Durability

The ability of heartwood to resist decay and microbial attack due to the presence of protective substances.

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Study Notes

Wood Structure and Function

  • Woody plants have vessels that conduct water and nutrients.
  • Sapwood: These vessels remain functional for a few years, often just one.
  • Heartwood: These vessels stop conducting water and nutrients.
  • Heartwood Vessels: Often filled with substances (e.g. tannins, resins).
  • Heartwood Significance:
    • Darker in color than sapwood due to filling materials.
    • More decay-resistant than sapwood.
    • Improved resistance to microbial attacks.

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Description

This quiz explores the structure and function of woody plants, focusing on the characteristics of sapwood and heartwood. Learn about the roles of vessels in water and nutrient conduction, and discover the significance of heartwood in terms of decay resistance and microbial protection.

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