Question No:1

In stem

[A] protoxylem lies towards pith (centre)
[B] metaxylem lies towards periphery of the organs
[C] endarch arrangement present
[D] all



Question No:2

In root

[A] endarch arrangement is present
[B] exarch arrangement is present
[C] protoxylem lies towards the centre
[D] metaxylem lies towards the periphery



Question No:3

Phloem transports

[A] water
[B] mineral
[C] food materials
[D] all



Question No:4

How many elements are composed in phloem in angiosperm?

[A] 1
[B] 2
[C] 3
[D] 4



Question No:5

Phloem is composed of all except

[A] sieve tube elements
[B] companion cells
[C] phloem parenchyma and sclerenchyma
[D] vessels



Question No:6

Gymnosperm posses

[A] sieve tubes
[B] companion cells
[C] albuminous cell and sieve cells
[D] all



Question No:7

Select the incorrect statement from the following:

[A] End walls of sieve tube have sieve plates
[B] Sieve tube and companion cell are connected by pit present between common longitudinal wall
[C] Companion cells are specialized parenchymatous cells having nucleus which control function of sieve tubes
[D] Phloem parenchyma is present in most of monocots



Question No:8

Following are live components of phloem except

[A] sieve rube
[B] companion cell
[C] phloem parenchyma
[D] phloem fibre (bast fibre)



Question No:9

Following are dead components of xylem except

[A] tracheids
[B] vessels
[C] xylem sclerenchyma (wood fibres)
[D] xylem parenchyma



Question No:10

Select the correct statement from the following:

[A] Companion cells help in maintaining pressure gradients in the sieve tubes
[B] Phloem parenchyma stores food material
[C] Bast fibres are generally absent in the primary phloem but are found in secondary phloem
[D] All



Question No:11

Following are the features of phloem fibres except

[A] pointed apices
[B] more elongated
[C] branched
[D] unbranched



Question No:12

Phloem fibre, which is commercially used, is actually

[A] jute
[B] flax
[C] hemp
[D] all



Question No:13

Select the incorrect matching:

[A] Protophloem — Narrow sieve tubes
[B] Metaphloem — Bigger sieve tubes
[C] Gymnosperm — Albuminous cells and sieve cells
[D] Gymnosperm – Vessels in xylem



Question No:14

A mature sieve tube differs from vessel in

[A] being nearly dead
[B] lacking cytoplasm
[C] lacking a functional nucleus
[D] absence of lignified walls



Question No:15

In pteridophyta and gymnosperms, which cells are present in place of companion cell?

[A] Sclereids
[B] Albuminous cells
[C] Idioblasts
[D] None of the above