Which one of the following statements is/are correct for a vascular bu

Which one of the following statements is/are correct for a vascular bundle in which xylem and phloem are jointly situated along the same radius ?

  • These are called conjoint vascular bundles.
  • Cambium may be present in such vascular bundles.
  • Conjoint vascular bundles are always of closed type.

Select the answer using the code given below :

1 only
1 and 2 only
2 and 3 only
1, 2 and 3
This question was previously asked in
UPSC Geoscientist – 2024
Statement 1 is correct: Vascular bundles in which xylem and phloem are jointly situated along the same radius are called conjoint vascular bundles. Statement 2 is correct: Cambium may or may not be present between xylem and phloem in conjoint bundles. If present, they are called open conjoint bundles, characteristic of dicot stems. Statement 3 is incorrect: Conjoint vascular bundles can be open (with cambium) or closed (without cambium, characteristic of monocot stems).
Conjoint vascular bundles have xylem and phloem on the same radius and can be open (with cambium) or closed (without cambium).
Radial vascular bundles have xylem and phloem arranged on different radii, alternating with each other (typical of roots). Conjoint bundles are characteristic of stems and leaves. Collateral conjoint bundles have xylem towards the center and phloem towards the periphery. Bicollateral conjoint bundles have phloem on both sides of the xylem.