wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

As secondary growth proceeds, in a dicot stem, the diameter

A
sapwood increases
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
heartwood increases
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
both sapwood and heartwood increases
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
both sapwood and heartwood remains the same
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B heartwood increases
In young trees and young parts of older trees, all of the wood in the stem is sapwood. But as the tree gets older and its trunk increases in diameter, things change.
The cells nearest the center of the trunk die, but they remain mostly intact. As these older sapwood cells age and die, they become heartwood.
So both sapwood and heartwood are produced but it is only the heartwood which increases in diameter as compared to sapwood. Sapwood width remains fairly constant.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Secondary Growth
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon