BOTANY
99
PAPER-I
Time Allowed Three hours Maximum Marks 300
The figures in the margin indicate full marks for the questions
Candidates should answer Question Nos. 1 and 5 which are compulsory and any
three of the remaining questions, selecting at least one from each Section
Answers must be written in ENGLISH only
Neat sketches may be drawn, wherever required

SECTION-A
1. Answer any three of the following in not more than 200 words each 20x3=60
Give an account of the physical and chemical organisation of bacterial cell wall.

Explain the evolutionary significance of heterospory.


Discuss various symptoms of plant diseases caused by fungus.


Give an account of the production of bacterial biofertilizer.
Discuss the degeneration of sexuality in Ascomycetes.



2. Distinguish between the following ·12x5=60

Flagella and


Grain-positive and gram-negative bacteria


Magnetosomes and phycobilisomes


Facultative parasites and facultative saprophytes


Chlamydospores and blastospores


Describe the seed structureattributed to the members of pteridosperms.


Give an account of the developmental process and cellularlzation of
different types of endusperm.



Give the distinguishing characters, floral formulae and floral diagrams of
the following families



Poaceae


Brassicaceae


[P.T.a.
· 3. Answer the following 15x4=60
Give an account of the post-fertilization changes leading to the formation of cystocarp in Rhodophyceae.
"There is a progressive sterilization of sporogenous tissue in bryophytes." Discuss the statement.
Give an illustrated account of the sexual reproduction in Voucheria and-­comment on its systematic position.
Critically examine different views pertaining to the evolution of thallus in green algae.
4. Write critical notes on the following 12x5=60
Clamp connection
Spore dispersal mechanism in bryophytes
Rhizophore of Selaginella
Sexual reproduction in diatoms
Heterocyst
SECTION-B

6. Answer the following i5x4=60 Compare and contrast the Bennettitalean fructification with the present­day angiospermic flower.
2

Asteraceae
12x5=60
7. Write explanatory notes on the following

Study of palynology in relation to taxonomy


The concept of progymnosperms


Centres of origin of cultivated plants as proposed by Vavilov


Triple fusion


Floral architecture of orchids


8. Write the correct botanical name and the family to which it belongs, and the parts used for each of the following: 10=60

Olive


Borage


Nutmeg


Vetiver


Soap nut


Ishabgul


Mint


Clove


Opium


Cane



12RQ-100
3