Why is heartwood darker in color than sapwood?
a. heartwood is closer to the center of the stem; sapwood is away from the center of the stem
b. heartwood does not conduct water; sapwood is active in fluid transport
c. heartwood contains xylem tissue; sapwood contains phloem tissue
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Why is heartwood darker in color than sapwood?
a. heartwood is closer to the center of the s...
a. heartwood is closer to the center of the s...
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