Home
Class 11
BIOLOGY
Assertion: Monocotyledonous and dicotyle...

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

Text Solution

Verified by Experts

The correct Answer is:
B
Monocotyledonous and dicotyledonous plants show marked vaiation in theiur interal structured. They differ in type, number and location of vascxular bundles.
The secondary growth occurs in most of the dicotyledonous roots and stems and it increases the giorth (diameter) of the organs by the acitvity of the vascualar cambium nd the cork cambium.
Promotional Banner

Topper's Solved these Questions

  • ANATOMY OF FLOWERING PLANTS

    A2Z|Exercise Section C : Previous Years' Examination Question (NEET/AIPMT Questions )|71 Videos

  • ANATOMY OF FLOWERING PLANTS

    A2Z|Exercise Section C : Previous Years' Examination Question (AIIMS Question)|17 Videos

  • ANATOMY OF FLOWERING PLANTS

    A2Z|Exercise Section A : Topicwise Questions Topic 6 : Secondary Growth (vascular Cambium , Cork Cambium And Seco|27 Videos

  • ANIMAL KINGDOM

    A2Z|Exercise Section D : Chapter End Test|50 Videos

Similar Questions

Explore conceptually related problems

Assertion. Vascular cambium is absent in monocots. Reason. In monocot roots, secondary growth occurs by the activity of vascular cambium.

During the secondary growth in a dicotyledonous stem, the fusiform initials of vascular cambium give rise to which of the given labelled part?

Assertion: Secondary growth usually occurs in dicotyledonous stems. Reason: The vascular cambium present between xylem and phloem possesses the ability to form secondary xylem and secondary phloem respectively.

$ Secondary growth occurs in those plants which have closed vascular bundles. ! Cork is produced by intrafascicular cambium.

Assertion :- Both vascular cambium and cork cambium are lateral meristem. Reason :- Both are involved in secondary growth of plant by additon of cells in lateral direction of main axis.

In dicotyledonous plants and gymnosperms, the lateral meristems-vascular cambium and cork cambiumappear later in life. They are the meristems that cause increase in the gowrth of the organs in which they are active. This is known as

Select the incorrect statement/s : (A) Root apical meristem and shoot apical meristem are responsible for the secondary growth of the plants (B) Root apical meristem and shoot apical meristem contribute to increasing girth of the plant organs (C) In dicotyledonous plants and gymnosperms the lateral meristems, vascular cambium and cork cambium contribute to the elongation of the plant organs in which they are active (D) The development is the sum of growth and differentiation

Assertion (A) Secondary growth in dicot roots occur with the help of vascular cambium and phellogen. Reason (R ) Vascular cambium is formed from conjuctive parenchyma and part of pericycle.