NEETBotanyAnatomy of Flowering Plants
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The vascular bundles in the stems and leaves of monocotyledonous plants are described as 'open'. Reason (R): Cambium is absent between the xylem and phloem in the vascular bundles of monocotyledonous plants. In the light of the above statements, choose the correct answer from the options given belo
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
D. (A) is false but (R) is true
Step-by-step solution
The Assertion is false. In monocotyledonous plants, the vascular bundles of stems and leaves lack cambium between the xylem and phloem. Because they do not possess cambium and cannot form secondary tissues, they are referred to as 'closed' vascular bundles, not 'open'. The Reason is true. Cambium is indeed absent in the vascular bundles of monocots. Open vascular bundles, which contain cambium, are characteristic of dicotyledonous stems. Therefore, (A) is false but (R) is true. Answer: (A) is false but (R) is true