The term 'bark' refers to

• Phellem, phelloderm and vascular cambium

• Periderm and secondary xylem

• Cork cambium and cork

• Phellogen, phellem, phelloderm and Secondary phloem

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

Duramen is present in

• inner region of secondary wood

• part of sap wood

• outer region of secondary wood

• region of pericycle

Meristematic tissue in vascular bundle is

• phellem

• procambium

• interfascicular cambium

• fascicular cambium

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

Ectophloic siphonostele is found in

• Adiantum and Cucurbitaceae

• Osmunda and Equisetum

• Marsilea and Botrychium

• Dicksonia and maiden hair fem

In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues?

• Stem and root

• All parts

• Shoot tips and root tips

• Flowers, fruits and leaves

In monocot roots which types of vascular bundles are found?

• Collateral, conjoint and closed

• Radial with exarch xylem

• Bicollateral, conjoint and closed

• Radial with endarch xylem

Periderm includes

• cork cambium only

• cork cambium and cork

• cork and secondary cortex

• cork cambium, cork and secondary cortex

80.

As secondary growth proceeds, in a dicot stem, the thickness of

• sapwood increases

• heartwood increases

• both sapwood and heartwood increases

• both sapwood and heartwood remains the same