Question

The older resin clogged secondary xylem in the central part of the tree trunk and the younger outer secondary xylem, which conducts water are ........ and ............ respectively.

• A. Duramen and alburnum
• B. Alburnum and duramen
• C. Autumn wood and spring wood
• D. Spring wood and autumn wood

Answer 1

The correct option is A Duramen and alburnum

Duramen is the older inactive wood in the central part of a tree usually darker and denser than the surrounding sapwood. Alburnum is the white and softer part of wood between the inner bark and the hard wood or duramen.

Wood form in autumn season that contains smaller cells is called as autumn wood. Spring wood is the softer and more porous portion of an annual ring of wood that develops early in the growing season.

Thus, the correct answer is option A.