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Radical vascular bundles are those in which
- a)xylem is surrounded by phloem
- b)phloem is surrounded by xylem
- c)xylem and phloem occur on the same radius
- d)xylem and phloem occur on the different radii
Correct answer is option 'D'. Can you explain this answer?
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Radical vascular bundles are those in whicha)xylem is surrounded by ph...
With the help of examples, explain the various types of vascular bundles.
In angiosperms the vascular bundles are mainly of three types (i) radial (ii) conjoint (iii) concentric.
(i) Radial : Presence of radial vascular bundles is the characteristic feature of roots. Those vascular bundles in which xylem and phloem are present on different radii are known as radial vascular bundles. In between xylem and phloem bundles parenchymatous cells are present.
(ii) Conjoint : In these vascular bundles xylem and phloem are present on the same radii. Conjoint vascular bundles may be collateral (phloem is present only outer to xylem) or bicollateral (phloem is present on both sides of xylem). If cambium is present between xylem and phloem then the vascular bundle is known as open, otherwise it is called closed.
(iii) Concentric : Those vascular bundles in which one type of vascular tissue is surrounded by another type are known as concentric vascular bundles. These bundles may be amphivasal or leptocentric(phloem is completely surrounded by xylem) or amphicribal or hardocentric (xylem is completely surrounded by phloem). Amphivasal bundles are found in Dracaena and Yucca. Amphicribal bundles are found in stamens of many dicots etc.
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Radical vascular bundles are those in whicha)xylem is surrounded by ph...
Understanding Radical Vascular Bundles
Radical vascular bundles are a specific arrangement of vascular tissues in plants. To understand why option 'D' is the correct answer, let’s explore the structure and organization of these bundles.
Definition of Vascular Bundles
- Vascular bundles are strands of xylem and phloem, the two types of vascular tissues responsible for transporting water, nutrients, and food throughout the plant.
Characteristics of Radical Vascular Bundles
- In radical vascular bundles, xylem and phloem are arranged in a specific manner:
- The xylem and phloem are located on different radii from the center of the stem or root.
- This arrangement is distinct from other types of vascular bundles, such as collateral bundles, where phloem is found outside the xylem on the same radius.
Significance of the Arrangement
- The separation of xylem and phloem allows for efficient transport:
- Xylem primarily conducts water and minerals from the roots to the rest of the plant.
- Phloem transports the products of photosynthesis (primarily sugars) from leaves to other parts of the plant.
- This radial arrangement is crucial for optimizing the plant’s ability to manage its resources effectively.
Conclusion
- Therefore, the correct answer is option 'D': in radical vascular bundles, xylem and phloem occur on different radii, facilitating their specific functions in the plant's vascular system. Understanding this arrangement is essential for studying plant anatomy and physiology.
Radical vascular bundles are a specific arrangement of vascular tissues in plants. To understand why option 'D' is the correct answer, let’s explore the structure and organization of these bundles.
Definition of Vascular Bundles
- Vascular bundles are strands of xylem and phloem, the two types of vascular tissues responsible for transporting water, nutrients, and food throughout the plant.
Characteristics of Radical Vascular Bundles
- In radical vascular bundles, xylem and phloem are arranged in a specific manner:
- The xylem and phloem are located on different radii from the center of the stem or root.
- This arrangement is distinct from other types of vascular bundles, such as collateral bundles, where phloem is found outside the xylem on the same radius.
Significance of the Arrangement
- The separation of xylem and phloem allows for efficient transport:
- Xylem primarily conducts water and minerals from the roots to the rest of the plant.
- Phloem transports the products of photosynthesis (primarily sugars) from leaves to other parts of the plant.
- This radial arrangement is crucial for optimizing the plant’s ability to manage its resources effectively.
Conclusion
- Therefore, the correct answer is option 'D': in radical vascular bundles, xylem and phloem occur on different radii, facilitating their specific functions in the plant's vascular system. Understanding this arrangement is essential for studying plant anatomy and physiology.
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Radical vascular bundles are those in whicha)xylem is surrounded by phloemb)phloem is surrounded by xylemc)xylem and phloem occur on the same radiusd)xylem and phloem occur on the different radiiCorrect answer is option 'D'. Can you explain this answer?
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