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Assertion : Generally, dicotyledonous pl...

Assertion : Generally, dicotyledonous plants have tap roots and reticulate venation while monocotyledonous plants have fibrous roots and parallel venation
Reason : The morphological feature of stem like the presence of nodes and internodes, multicellular hairs and positively phototrophic nature help to differentiate the stems from roots.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
B
Generally, dicotyledonous plants have tap roots and reticulate venation while monocotyledonous plants have fibrous roots and parallel venation
The morphological feature of stem like the presence of nodes and internodes, multicellular hair and positively phototrophic nature help to differentiate the stems from roots.
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If a plant has leaves with reticulate venation, what kind of roots will it have?

If a plant has fibrous root, what type of venation do its leaves likely to have?

Select correct statements from the following: a. In the majority of the dicotyledonous plants, the direct elongation of the radicle leads to the formation of the primary root. b. In monocotyledonous plants, the primary root is short-lived and is replaced by a large number of roots. These roots originate from the lowermost node of the stem and constitute the fibrous root system. c. Adventitious roots are found in Monstera and banyan tree. d. The fibrous root system is found in wheat and mustard plants.

Assertion: Monocotyledonous and dicotyledonous plants shownmarked variation in their internal structures.They differ in type , number and location of vascular bundles Reason: The secondary growth occurs in most of the dicotyledonous roots and stems and it increases the girth (diameter ) of the organs by the activity of the vascular cambium and the cork cambium