Question No:1

Mycorrhizal roots are found in

(A) Pisum
(B) Pinus
(C) Vanda
(D) Lichens

Question No:2

Tap (primary) root is descending axis that develops from

(A) radicle
(B) hypocotyl
(C) epicotyl
(D) radical

Question No:3

Region of fastest growth in root is

(A) root hair zone
(B) behind root tip
(C) root tip
(D) before the root tip

Question No:4

Root cap is largest in

(A) Banyan
(B) Pandanus
(C) Jussiaea
(D) Maize

Question No:5

Adventitious roots are

(A) those arising from any part of plant other than radicle
(B) found in monocots
(C) found in pteridophytes also
(D) all of the above

Question No:6

Which is not a root?

(A) Carrot
(B) Sugarbeet
(C) Radish
(D) Potato

Question No:7

Pneutmatophores are common in

(A) Alpine plants
(B) Heliophytes
(C) Hygrophytes
(D) Mangroves

Question No:8

Which plant does not have nodular roots?

(A) Cicer arietinum (Bengal gram)
(B) Arachis hypogea (Ground nut)
(C) Dalbergia sissoo
(D) Cassia fistula

Question No:9

A tap root is always

(A) positively geotropic and positively hydrotropic
(B) positively phototropic and positively hydrotropic
(C) negatively geotropic and positively hydrotropic
(D) negatively hydro topic and negatively geotropic

Question No:10

Mycorrhizae are symbiotic association between

(A) fungi and fungi
(B) fungi and roots of higher plants
(C) fungi and bacteria
(D) bacteria and roots of higher plants or trees

Question No:11

In maize and sugarcane stem, stilt roots arise from

(A) lower internodes
(B) lower nodes
(C) any node
(D) any intern ode

Question No:12

Root hairs develop from

(A) zone of cell maturation
(B) zone of cell elongation
(C) zone of mature cells
(D) zone of cell formation

Question No:13

Roots are called adventitious depending on their

(A) structure
(B) origin
(C) position
(D) function

Question No:14

Pneumatophores of mangrooves differ from respiratory roots of Jussiaea in being

(A) modified branch of tap roots
(B) modified adventitious roots
(C) stem branch
(D) pillar roots

Question No:15

Root hair absent in hydrophytes because

(A) they do not absorb salts
(B) they absorb water from body surface
(C) absorption occur by leaves
(D) surface area of plant is high and roots are very large

Question No:16

Partial root parasite is

(A) Viscum
(B) Cuscuta
(C) Santalum album
(D) Loran thus

Question No:17

Fibrous roots are found mostly in

(A) dicots
(B) monocot plants
(C) pteridophytes
(D) bryophytes

Question No:18

Rhizophora has

(A) Pneumatophores and vivipary both
(B) Floating roots
(C) Fleshy roots
(D) all of these

Question No:19

Stem in Cuscuta is

(A) Trailer
(B) Twiner
(C) Straggler
(D) Root climber

Question No:20

Vertically growing underground stem is

(A) corm
(B) bulb
(C) rhizome
(D) bulbil