Which of the following is absent in phloem of Pinus
Phloem parenchyma
Sieve cells
Companion cells
None of these
Initiation of lateral roots and vascular cambium during the secondary growth takes place in these cells.
Two cross-sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by
In a woody dicotyledonous tree, which of the following parts wall mainly consist of primary tissues
Centripetal and centrifugal xylem are the important features of
Trees at sea do not have annual rings because