Duramen is present in
inner region of secondary wood
part of sap wood
outer region of secondary wood
region of pericycle
A.
inner region of secondary wood
The xylem elements of the stems of a number of trees develop dark brown colour, especially in the central or innermost layers.
It comprises dead element with higly lignified walls and is called heart wood or duramen. It is present in inner region of secondary wood.
Secondary xylem and phloem in dicot stem are produced by
Apical meristems
Vascular cambium
Axillary meristems
Phellogen
Meristematic tissue in vascular bundle is
phellem
procambium
interfascicular cambium
fascicular cambium
Ectophloic siphonostele is found in
Adiantum and Cucurbitaceae
Osmunda and Equisetum
Marsilea and Botrychium
Dicksonia and maiden hair fem
What differentiates leaf of dicots from monocots?
Parallel venation
Differentiation of palisade and spongy parenchyma
Stomata only on upper side
Stomata both on upper and lower sides
Quiescent centre is the zone of
least mitotic activity in the root apex
least mitotic activity in the shoot apex
maximum mitotic activity in the root apex
maximum mitotic activity in the shoot apex
The term 'bark' refers to
Phellem, phelloderm and vascular cambium
Periderm and secondary xylem
Cork cambium and cork
Phellogen, phellem, phelloderm and Secondary phloem
