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Identify the incorrect statement.

1. Sapwood is involved in conduction of water and minerals from root to leaf
2. Sapwood is the innermost secondary xylem and is lighter in colour
3. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
4. Heart wood does not conduct water but gives mechanical support

Correct answer: Sapwood is the innermost secondary xylem and is lighter in colour

Solution

Sapwood is the outer, living secondary xylem that conducts water and minerals and is usually lighter in color. Heartwood is the inner, non-conducting, darker wood that mainly provides mechanical support, so the statement calling sapwood the innermost secondary xylem is incorrect.

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