colletral and radial difference
Answers
Explanation:
Collateral vs Bicollateral Vascular Bundles
(Similarities and Differences between Collateral and Bicollateral Vascular Bundles)
Vascular bundles are the distinct structural organization vascular tissues (xylem and phloem) and the formation of vascular bundles is one of the advanced characteristics of higher plants. In the stem of seed plants, the vascular tissue (xylem and phloem) occupy together as vascular bundles. However, in roots the xylem and phloem are not associated together and not form the vascular bundles. Such an arrangement of vascular tissue in root is called radial arrangement.
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Difference between Collateral and Bicollateral Vascular Bundles
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Collateral vs Bicollateral vascular bundle
Collateral vs Bicollateral Vascular Bundles
(Similarities and Differences between Collateral and Bicollateral Vascular Bundles)
Vascular bundles are the distinct structural organization vascular tissues (xylem and phloem) and the formation of vascular bundles is one of the advanced characteristics of higher plants. In the stem of seed plants, the vascular tissue (xylem and phloem) occupy together as vascular bundles. However, in roots the xylem and phloem are not associated together and not form the vascular bundles. Such an arrangement of vascular tissue in root is called radial arrangement.
In the previous post we have discussed the Structure and Classification of Vascular Bundles. Based on the relative position and number of phloem strands in vascular bundles, the conjoint vascular bundles are classified into two groups: (1). Collateral vascular bundles and (2) Bicollateral vascular bundles.
Bi-collateral vascular bundles(1). Collateral vascular bundle: A type of conjoint vascular bundle where the xylem occupies inner to a single strand of phloem. Example: dicot stem and monocot stem.
(2). Bicollateral vascular bundles: A type of conjoint vascular bundle where the xylem is situated in the middle of two phloem strands. Example: stem of Cucurbita, Cephalandra (members of Cucurbitaceae Family).
Difference between Collateral and Bicollateral Vascular Bundle
Sl. No. Collateral Vascular Bundles Bicollateral Vascular Bundles
1 Possess a single patch of phloem. Possess two patches of phloem.
2 Phloem is located external to the xylem (towards the periphery) Phloem occupy on both sides of the centrally placed xylem strand.
3 Contain one strip of cambium between the xylem and phloem Contain two strips of cambium, one between outer phloem and xylem and the other between inner phloem and xylem
4 Collateral vascular bundles can be open (dicot stem) or closed (monocot stem) Bicollateral vascular bundles are always open.
5 Example: Dicot stem (open), monocot stem (closed) Examples: Cucurbita stem, Cephalandra stem...,.
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Answer:
Radial bundles are considered to be the vascular bundles in which xylem and phloem are separated by a non-vascular bundle and are located alternate radii on axis. So the correct option is 'Both dicot root and monocot root'.
Collateral bundle is a vascular bundle in which the phloem and xylem lie on the same radius, with the phloem located toward the periphery of the stem and the xylem toward the center.