$A$. Heart wood is durable, dark and central in position.
$B$. Tyloses are balloon like structures of xylem parenchyma in vessel lumen.
$C$. Late wood is formed during spring season.
All are correct
Only $A$ is correct
Only $B$ is incorrect
Only $C$ is incorrect
Normal secondary growth occurs in
Give differences: Heartwood and Sapwood
Secondary growth or increase in diameter is due to
In the primary tissues of the stem, the cambium separating xylem and phloem is called