Growth rings are formed due to activity of
Extrastelar cambium
Intrastelar cambium
Interstelar cambium
Both $(a)$ and $(c)$
The heartwood cannot conduct water because of
One year's growth in length of a young woody shoot is the distance between successive
The intrafascicular cambium
Cork is used as the stopper for bottles, for shock absorption and insulation because of
Which one of the following is not a lateral meristem?