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- #Structural Organisation in Animals and Plants
- #Biology
- #Medical
- #National Eligilibility Cum Entrance Test
Cortex is the region found between
- Option 1)
epidermis and stele
- Option 2)
pericycle and endodermis
- Option 3)
endodermis and pith
- Option 4)
endodermis and vascular bundle
Answers (1)
As learnt in
Stele -
The Stele is the whole central mass of vascular tissue (vascular cylinder) with or without pith surrounded by endodermis. Steler system is started from pteridophytes.
- wherein
In order of evolution types of stele are: protostele (most primitive and simple), siphonostele. Solenostele, dictyostele, eustele and atactostele.
Cortex and its type -
Cortex lies in between epidermis and pericycle which is further divided into hypodermis, general cortex and endodermis-
* Hypodermis - It is collenchyma in dicot stem & sclerenchyma in monocot.
* General cortex - Parenchyma and it stores food.
* Endodermis (starch sheath) - Made up of parenchymatous barrel-shaped. Endodermal cells of roots are known as Casparian strips.
-
Stele =pericycle+vascular tissue +pith
Option 1)
epidermis and stele
Correct option
Option 2)
pericycle and endodermis
Incorrect option
Option 3)
endodermis and pith
Incorrect option
Option 4)
endodermis and vascular bundle
Incorrect option
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