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Hint: They are part of vascular conducting tissues in plants. They help in the transportation of mainly water and nutrients in the various plant parts and are differentiated on the basis of their structure and development.
Complete answer:
Based on the arrangement of protoxylem and metaxylem, xylem is of two types:
1.Endarch xylem
2.Exarch xylem
Note: The main difference between protoxylem and metaxylem is that protoxylem is the first formed part of the xylem whereas metaxylem forms the later part of the xylem. They are both the two types of primary xylem tissues that occur during xylem.
Complete answer:
Based on the arrangement of protoxylem and metaxylem, xylem is of two types:
1.Endarch xylem
2.Exarch xylem
Exarch xylem | Endarch xylem |
It is the arrangement in which the protoxylem is directed towards the center and metaxylem elements towards the periphery. | It is the arrangement in which the protoxylem is directed towards the periphery and metaxylem towards the center. |
The development of the xylem in this arrangement follows the centrifugal pattern. | The development of the xylem in this arrangement follows the centripetal pattern. |
It is the characteristic of the stem of the flowering plants. | It is the characteristic feature of the roots. |
It is a condition when there is more than one strand of primary xylem in a stem or root. | It is a condition when there is one strand of primary xylem in a stem or root. |
The xylem develops from the outside inwards towards the center. | The xylem develops from the inside outwards towards the periphery. |
Note: The main difference between protoxylem and metaxylem is that protoxylem is the first formed part of the xylem whereas metaxylem forms the later part of the xylem. They are both the two types of primary xylem tissues that occur during xylem.
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