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Xylem is the vascular tissue responsible for transporting water and dissolved minerals from roots to leaves. Phloem does the opposite — it carries sugars produced during photosynthesis downward. A quick way to remember: Xylem = up, Phloem = food.
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Xylem is the vascular tissue that transports water and dissolved minerals from the roots upward. It's essential for photosynthesis and gives wood its structural strength.
Damaged xylem reduces water transport, causing wilt and dieback. Common causes include boring insects, mechanical wounds, and vascular wilt diseases like Dutch elm disease.
All 10 domains covered
Every question mapped directly to the official ISA certification blueprint.
| No. | Domain | Questions |
|---|---|---|
| I | Tree Biology | 200 |
| II | Soil + Water Relations | 200 |
| III | Pruning | 200 |
| IV | Diagnosis + Treatment | 200 |
| V | Tree Identification | 200 |
| VI | Safety + Risk Assessment | 200 |
| VII | Urban Forestry | 200 |
| VIII | Installation + Establishment | 200 |
| IX | Trees + Construction | 200 |
| X | Safe Work Practices | 200 |
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