Tracheids differ from the tracheary elements in:
1. | Having casparian strips |
2. | Being imperforate |
3. | Lacking nucleus |
4. | Being lignified |
Gymnosperms are also called softwood spermatophytes because they lack:
1. Cambium
2. Phloem fibres
3. Thick-walled tracheids
4. Xylem fibres
The chief water conducting elements of xylem in gymnosperms are:
1. | vessels | 2. | fibres |
3. | transfusion tissue | 4. | tracheids |