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Differentiate the following 1. Bark & Periderm 2. Heartwood &Sapwood 3. Endarch & Exarch |
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Answer» 1. Bark – It is the tissue outside vascular cambium. Periderm – It is the outer protective tissue It includes phellem, phellogen, and phelloderm. 2. Heartwood – It is the dark coloured, nonfunctional central part of wood resistant to the attack of microorganisms. Sap wood – It is the light coloured, functional and peripheral part of wood. 3. Endarch – It is the arrangement of xylem in which protoxylem facing towards centre and metaxylem towards the periphery, eg. stem. Exarch – It is the arrangement of xylem in which Metaxylem facing towards centre and protoxylem towards periphery.eg: Root. |
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