In which of the following,the cortex,endodermis,pericycle,and pith are not clearly distinguishable?

Water cavity is found in -

In which group of plants are bordered pits found in the xylem vessels?

Complete the following analogy-type questions:
$(i)$ Root : Root hair :: Stem : ...........
$(ii)$ Dicot stem : Open vascular bundle :: Monocot stem : ...........

Which of the following parts of a dicot stem contains tissue that provides mechanical strength to the young stem?

Choose the correct option from the following:
In $ \text{monocot} / \text{dicot} $ stem, the vascular bundles are arranged in a ring.