I Fo 5

_rial No. 16639

BOTANY
Paper-I
(Time Allowed: Three Hours) (Maximum Marks 200]
INSTRUCTIONS
Candidates sboUld attempt Question Nos. 1 and 5
wbicb are £ompulsory, and THREE of the
remaining questions, selecting at least ONE
from each Section.
AU questions carry equal marks. Marks allotted to
parts of a question are indicated against each.
Answers must be written in ENGLISH only.
Neat sketches may be drawn, wherever required.

.SECTION-A
I. Answer any FOUR of the following (answer should not exceed 150 words in each case) :-lOx4=40
Write critical notes on the following

(i)Heterocyst and its functions.

Flagella and Pili.

Write short notes on the following
Phytoalexins.
Totipotency.

Differentiate between the' following
Globule and Nucule.
Rein-deer moss and Peat moss.
Write about the following
Morphology of the spoTocarp of lvfarsilea.
Eusporangiate and Leptosporangiate ferns.
Write critical notes on
Tungro Virus.
The concept of phytoncides.
Give an account ·of various pigments present in algae. 20
Discuss the role of rnycotoxins in food and feed. 20
Explain the molecular basis of infection in plants. 10
(b)Comment on the role ofsoil solarization in disease control. 10
Write an account of the structural defense mechanisms in plants. 10
Give a note on tissue differentiation in roots. 10
4. Distinguish between the gametophytic generations of Riccio and Marchantia. Draw their graphic life-cycles indicating ploidy level in each phase. 20
Comment on the role ofSalvinia and Azolla in the environment. Compare the sporocarp of Salvinia with that of Azolla. 20
2 (Contd.)
xxx

SECTION-B
Answer any FOUR of the following (answer should be within 150 words in each case) :-lOx4=40
Distinguish between the following

(i)Holotype and Isotype.

Stomata and Hydathodes.
Give brief account of the following

Angiospennic features of Gnetum.

Fonnation of Peridenn.
Comment critically on the following

Why gymnospenns are called naked 'seeded . plants?

Anemophilous and Entomophilous pollination.
Write short notes on the following

Plumbago type of embryosac development.

Stratification of Pollen grain walls.
Write short notes on the following
Hypanthodium.
Inflorescen'ce of Poaceae.
6. Draw the scientifically accurate diagrams of the following and label the parts correctly:-lOx4=40
(a)Floralparts ofanytypemember ofEuphorbiaceae and Liliaceae.
L.S. of male and female cones of Cycas.
Floral fannula and floral diagram of Orchidaceae . and
Radial, collateral closed, bicollateral and arnphivasal vascular bundles.


3 (Contd.)
xxx
7. Write brief critical notes on the following
8x5=
Ethnobotany for exploration of plant wealth.
Distinguishing characters of Dipterocarpaceae and Ranunculaceae.
Distinguishing characters of Magnoliaceae and Cucurbitaceae.
Economic importance Solanaceae. of Brassicaceae and
Plants as sources of resins and dyes.
8. Give the. bqtanical naqlc, family and utility ofeach of the following :­lOx2=20 Safflower.
Rosewood.
Amla.
Guava.
Sunhenlp.
(vi)tue yanda.
Kahncgh.
(viii) Bitter gourd.
Pigeon pea.

Explain in detail about biosystematics. 20

4 xxx