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Question

Conjoint vascular bundle means

A
Xylem and phloem on different radii.
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B
Xylem and phloem on the same radius.
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C
Xylem outside and phloem inside.
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D
Phloem on both sides of xylem.
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Solution

The correct option is (C)

Explanation of correct option:

  1. In the conjoint type of vascular bundles, the xylem and phloem are arranged together in the same radius of vascular bundles.
  2. Such vascular bundles can be found on stems and leaves.
  3. They can be of two types based on the xylem phloem position in a ring.

Explanation of incorrect option:

Option (A):

  1. When xylem and phloem are on different radii it is called the radial vascular bundle.

Option (B):

  1. When xylem is seen surrounding the phloem, i.e. phloem is on the inside. It is called Amphivasal vascular bundle.

Option (D):

  1. Phloem on both sides of the xylem represents the conjoint bi-collateral type of vascular bundle.

Final answer:

Conjoint vascular bundle means Xylem and phloem on the same radius.


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