The xylem tissue in gymnosperms lacks:
1. Tracheids
2. Vessels
3. Xylem fibers
4. Xylem parenchyma
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In stems:
1. | the primary xylem is endarch with protoxylem towards the center and metaxylem towards the periphery |
2. | the primary xylem is endarch with metaxylem towards the center and protoxylem towards the periphery |
3. | the primary xylem is exarch with protoxylem towards the center and metaxylem towards the periphery |
4. | the primary xylem is exarch with metaxylem towards the center and protoxylem towards the periphery |
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