The plant undergoes wilting when

• xylem is blocked

• cambium is blocked

• phloem is blocked

• some roots are reduced in number

Vascular bundles of roots are

• conjoint

• concentric

• bicollateral

• radial

Ectophloic siphonostele is found in

• Osmunda and Equisetum

• Marsilea and Botrychium

• Adiantum and Cucurbitaceae

• Dicksonia and Maiden hair fern

Lenticular transpiration takes place in

• fruits

• woody stems

• leaves

• all of these

When the cell is fully turgid, its

• DPD = OP

• DPD = zero

• WP = TP

• OP = zero

What is the difference between pinocytosis and phagocytosis?

187.

Graham's law is correlated with

• diffusion

• osmoregulation

• osmosis

• absorption

A plant cell becomes turgid due to

• plasmolysis

• exosmosis

• endosmosis

• electrolysis

Living. cells placed in isotonic solution (0.9% saline) retain their size and shape. This is based on the concept of

• osmosis

• diffusion

• facilitated diffusion

• transpiration

In higher plants, continuity of cytoplasm from one cell to its neighbouring cells is established through

• apoplast

• chloroplast

• leucoplast

• symplast