Go through the following statements   (i) The cambium is generally more acitve on th
Channel: Doubtnut
Date: 03/05/2020

Go through the following statements   (i) The cambium is generally more acitve on the inner side than on the outer.  (ii) The autunn wood is darker and has a higher density than spring wood.  (iii) In stem, the secondary xylem shows distinction into protoxylem and metxylem and occurs in the from of patches.   (iv) The tracheids and vessels of the sapwood get plugged by the ingrowth of the adjacent parenchyma cells into thier cavities called tyloses.  Which of theses are correct ?