Vascular tissues in flowering plants develop from
Phellogen
Plerome
Periblem
Dermatogen
A timber merchant told to the customer that log of wood he is purchasing belongs to $20$ years old tree. He did so by
Histogen theory states that epidermis is derived from the
Which of the following statement$(s)$ is/are true?
$(A)$ Uneven thickening of cell wall is characteristic of sclerenchyma.
$(B)$ Periblem forms cortex of the stem and the root.
$(C)$ Tracheids are the chief water transporting elements in gymnosperms.
$(D)$ Companion cell is devoid of nucleus at maturity.
$(E)$ The Commercial cork is obtained from Quercus suber
Plants having little or no secondary growth are