In stems, the protoxylem lies towards the _____________ and the metaxylem lies towards the ____________ of the organ
centre; periphery
periphery; centre
periphery; periphery
centre; centre
The transverse section of a plant material shows the following anatomical features, $(a)$ the vascular bundles are conjoint, scattered and surrounded by clerenchymatous undle sheaths $(b)$ phloem parenchyma is absent. What will you identify it as?
$(i)$ The ...$a$... help in maintaining the pressure gradient in the sieve tubes
$(ii)$ Stomata regulate the process of ....$b$..... and gaseous exchange
Which of the following is/are living cells?
$I.$ Vessel, $II.$ Tracheids, $III.$ Companion cells
Assertion : Higher plants have meristematic regions for indefinite growth.
Reason : Higher plants have root and shoot apices.
Match the following
Column$-I$ | Column$-II$ |
$(a)$. Hypodermis in dicot stem | $(i)$ Absent |
$(b)$. Pericycle in dicot stem | $(ii)$ Parenchymatous |
$(c)$. Ground tissue in monocot stem | $(iii)$ Collenchymatous |
$(d)$. Phloem parenchyma in monocot stem | $(iv)$ Sclerenchymatous |