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Indian Forest Service (Main)
Examination, 2024 JBNV-U-BTNY
BOTANY
PAPER—I
Time Allowed : Three Hours Maximum Marks : 200
QUESTION PAPER SPECIFIC INSTRUCTIONS
Please read each of the following instructions carefully
before attempting questions
There are EIGHT questions in all, out of which FIVE are to be attempted.
_ Question Nos. 1 and 5 are compulsory. Out of the remaining SIX questions, THREE are to be
attempted selecting at least ONE question from each of the two Sections A and B.
Attempts of questions shall be counted in sequential order. Unless struck off, attempt of
a question shall be counted even if attempted partly. Any page or portion of the page left blank
in the Question-cum-Answer Booklet must be clearly struck off.
All questions carry equal marks. The number of marks carried by a question/part is indicated
against it.
Answers must be written in ENGLISH only.
Neat sketches may be drawn, wherever required.
JBNV-U-BTNY/41 1 (2:30.
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SECTION—A
What is a systemic fungicide? Describe the characteristics of an ideal
fungicide. 2+6=8
Describe Hfr strains of bacteria. How do they mediate bacterial recombination?
4+4=8
What are mycoplasmas? Compare mycoplasma with protoplasts and
spheroplasts. 4+4=8
Describe the various elementary processes associated with the telome theory.
Explain the origin of reproductive structures in ferns. 5+3=8
Highlight the salient features of progymnosperms, and discuss their affinities
with pteridophytes and gymnosperms. 4+4=8
Describe streptococci, staphylococci and sarcinae arrangements of cocci forms
of bacteria. Explain homo- and hetero-polysaccharides found in bacterial cell
wall. Draw and label the peptidoglycan structure of a typical Gram +ve
bacteria. 644-5515
Discuss the various anatomical features of gametophyte and sporophyte of a
member of Polytrichaceae. Comment on the significance of these features in
relation to environmental conditions. 5+5+5=15
Give an account of reserve food material found in various classes of algae. Add
a note on the algae in medicine. 6+4=10
What are the different types of interactions among microbes in soil? Discuss
their role in soil ecosystem. 10+5=15
Explain the xerophytic and hydrophytic characters of Equisetum. Give a
comparative account of spore-bearing structures of Selaginella and Equisetum.
5+5+5=15
“Gnetales are considered as a highly advanced group among gymnosperms.”
Justify the statement by commenting on the vegetative and reproductive
characters. 5+5=10
What are the symptoms of sheath blight of rice? Name its causal organism, and
describe the disease cycle and its management. 5+2+4+4=15
Discuss the general characteristics, range of thallus organization, and asexual
and sexual mode of reproduction in Chlorophyceae. 4+4+4+3-15
Explain coralloid roots with suitable diagram. How do they differ from the
normal roots of Cycas ? 5+5=10
JBNV-U-BTNY/41 2
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SECTION—B
Differentiate between the floral characters of Magnoliaceae and
Euphorbiaceae. Name two species of each of these families with their economic
importance. 4+4=8
Distinguish between artificial and natural system of classification. What are
their merits and demerits? 4+4=8
Discuss the importance of ethnobotany in the evolution of modern medicine.
How have the cultural and religious practices in India been helpful in
ethnobotanical studies? 4+4=8
What is gynogenesis? How is it different from androgenesis? 2+6=8
Comment on the importance of botanical gardens in India. 8
Distinguish between diplospory and apospory with suitable examples. 7+8=15
Write short notes on the following : 5x3=15
(0 Supportive evidences from palynology in taxonomy
(1) Principles of ICN
(11) Importance of herbaria in taxonomy
What are protoplasts? Describe briefly the protocol for enzymatic isolation of
protoplasts. 2+8=10
Write the botanical name, family and the uses of the plants from where the
following products are obtained : 3x5=15
(9 Resin
(1) Jute
(iii) Cassava
(iv) Long pepper
(v) Pyrethrum
(0 In a plant, both direct and indirect shoot regenerations are possible.
Which method will you prefer and why?
(ii) Give an example for cybrids produced through cell fusion and their
importance. 8+7=15
Describe the various events during fertilization starting from pollen
germination to fertilization in angiosperms. 10
JBNV-U-BTNY/41 3 1860;
8. (a) Give a detailed account of centres of origin of cultivated plants with reference
to Vavilovian concept. Differentiate between the primary and secondary centres
of origin. Name two plants of New World, presently cultivated in the Old World
at large scale. 6+5+4=15
(b) Describe the various stages of micropropagation. How can you use this
technology to reduce pressure on natural populations of endangered and
threatened plants? 12+3=15
(c) Describe the structure of stomata with a labelled diagram. Distinguish between
haplocheilic and syndetocheilic stomata. 5+5=10
kkk
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