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Indian Forest Services Exammatlon •••••••.
51. No. 1071
BOTANY
Paper-I
I Time Allowed Three Hours I I Maximum Marks 200 I
INSTRUCTIONS
Candidates should attempt Question Nos. 1 and 5
which are compulsory, and THREE of the
remaining questions, selecting at least ONE
question from each Section. ·
All 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
1. Answer any four of the following in not more
than 200 words each and together]
10x4=40
Write critical notes on the following
(i)Phyllody
(ii)Use of cybrids in plant
improvement
Write short notes on the following
Dikaryotization in Ustilago
Androgenic haploids

Differentiate between the following
Chlorosis and Necrosis
Polarity and Symmetry
Write about the following
Defense structures in plants against the attacking pathogen
Bacterial cell wall
Write critical notes on the following
Flagellar apparatus in algae
Evolutionary significance of heterospory

2.(a)"The coexistence of host plants and
their pathogens in nature indicates that
the two have evolved together."
Elaborate the above statement with
examples.
(b)"Somatic hybrid cell lines can be
developed by fusing the protoplasts
from two different sources."How will
you distinguish the somatic hybrid lines
from the parental cells? 20

3.(a)Give an account of sexual fruiting
bodies in ascomycetes.
(b)"There is progressive sterilization of
sporogenous tissue in bryophytes."
Critically examine this statement and
give examples for the same. 20

4.(a)Give an account of microorganisms
involved in biological nitrogen fixation. 20
What is heterothallism? Give an
account of different types of it in fungi. 20

5. Answer any four of the following in not more
than 200 words each and l!iJ together]
10x4=40
Give brief accounts of the following
Male germ unit
Types of stomata in dicotyledons
Distinguish between the following
Fertilization in Ephedra and
Gnetum
(ii)Leaf anatomy of C3 and C4 plants
(c)Comment critically on the following
(i)Why are ethnobotanical studies important in India?
(ii)Floral characters in Asclepiadaceae
(d)Write short notes on the following
(i)Apomixis and its economic importance
(ii)Archaeopteris
(e)Write short notes on the following
(i)Botanical gardens and their utility
Composition and products of latex

6.Draw scientifically accurate diagrams of the following and label the parts correctly 10x4=40
coralloid root of Cycas
(b)Ray and disc florets of Helianthus annuus and their floral diagrams
(c)Floral (reproductive fructification)
morphology and LS of ovule of Cycadeoidea (Bennettitales)
of caryopsis of any cereal
7. Write short notes on the following 1Qx4=40
(a)Economic importance of Brassicaceae and Solanaceae
Distinguishing features of successive cambia and interxylary phloem
Pollination by birds and bats
Embryo development in Paeonia
8.(a)Give a comparative account of the systems of classification of angiosperms
proposed by Hutchinson and Takhtajan. 20
(b)Give the botanical name, family and
part used of each of the following:2x 10=20
(i)Sesame
(ii)Avocado
(iii)Cassava
(iv)Flax
(v)Saffron
(vi)Cocoa
(vii)Cedar
(viii)Annatto
(ix)Pyrethrum
Belladonna