Question

Read the assertion and reason carefully to mark the correct option in question.

Assertion: Generally, dicotyledonous plants have tap roots and reticulate venation while monocotyledonous plants have fibrous roots and parallel venation.

Reason: The morphological features of the stem like the presence of nodes and internodes, multicellular hairs and positively phototropic nature help to differentiate the stems from roots.

Answer 1

It is true that dicotyledonous plants have tap roots and reticulate venation while monocotyledonous plants have fibrous roots and parallel venation. Hence, the assertion statement is correct.

Also the stems can be morphologically differentiated from that of roots because of the presence of nodes (from which branches and leaves emerge) and internodes (the gap between two successive nodes).

In contrast to roots, the stems are positively phototropic and bend towards the direction of light. The stems of some plants also have multicellular hairs known as trichomes.
Hence, the reason statement is also correct, however, not the correct justification of the assertion.