Word Count : 569

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i) Heartwood and sapwood
 

Heartwood	Sapwood
Located at the center of the trunk	Located in the outermost part of the trunk
Older, darker, and harder due to the accumulation of resins and tannins	Younger, lighter, and softer
No longer active in transporting water and nutrients	Active in transporting water and nutrients
Provides structural support to the tree	Involved in the growth of the tree
More resistant to decay and insect infestation	More vulnerable to decay and insect infestation
Has a lower moisture content	Has a higher moisture content
Used in high-quality woodworking due to its density and durability	Often discarded or used for lower-quality woodworking due to its lower density and durability

 

ii) Composite and ruminate endosperm

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