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BJKE-U-BTN
INDIAN FOREST SERVICE (MAINJEXAM- 2023
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.
Questions no. 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.
Neat sketches may be drawn, wherever required.
Answers must be written in ENGLISH only.
BJKE-U-BTN 7
౧1. (a)
(b)
(c)
(d)
(e)
Q2. (a)
09)
(০)
Qs. (a)
(b)
(০)
Q4. (a)
(b)
(c)
BUJKE-U-BTN
SECTION A
How does bacteria acquire resistance to any antibiotic ? Explain. 8
Compare the symptoms of wart disease of potato and late blight of
potato and name their causal organisms. 64+2=8
Compare the important features of Sporophytes of Anthoceros and
Funaria with suitable diagrams. 4+4=8
Describe heterospory and seed habit. Discuss their significance in the
evolution of plants. 44428
Describe female fructifications of (00768168105 and discuss its affinities
with Cycads. 4+4=8
Draw and describe the major differences in the cell wall compositions of
Gram-positive and Gram-negative bacteria. 275
Give an account of economic importance of algae with special reference
to their uses in : §4+54+5=15
(i) Food,
(ii) Industry, and
(iii) Biofertilizers.
Discuss the general characters that evolved in Bryophytes for terrestrial
habitats. 10
What are the major objectives behind studying plant pathology ?
Describe the different types of classification of plant diseases. 5+10=15
Give a comparative account of the development of female gametophytes
of Pinus and Gnetum. Comment on the affinities of Gnetum with
Conifers and Angiosperms. 15
Discuss the significance of heterothallism in fungi. Differentiate
between morphological and physiological heterothallism. 5+5=10
Describe the symptoms, causal organism, disease cycle and management
of ergot disease of pear! millet. 15
Describe the various stages of evolution of sporophyte in Bryophytes
with reference to the progressive sterilization of potential sporophytic
tissue. 15
Draw and label the flagellum of a Gram-negative bacteria. Describe the
different types of arrangements of flagella. 5+5=10
2
Q5. (৪)
(b)
(૦)
(6)
(e)
Q6. (a)
(b)
(८)
BIJKE-U-BTN
SECTION B
Describe the merits and demerits of Hutchinson’s system of
classification. 8
What is Periderm ? Discuss the major components of periderm. 2+6=8
What are the important agents which help plants in their pollination ? 8
Give four examples of old world plant species with their botanical names,
which have been cultivated for : 4-4-8
(1) over 4000 years.
(11) over 2000 years.
Explain somaclonal and gametoclonal variants and their applications. 8
Differentiate between the following : 7+8=15
(1) Liliaceae and Orchidaceae
(ii) | Cucurbitaceae and Euphorbiaceae
Mention the botanical name, family and the parts used of two plants of
each of the following categories : 5+5+5= 15
0) Timber
(ii) Millets
(iii) | Spices obtained from below ground parts
Differentiate between Intraxylary phloem and Interxylary phloem with
the help of suitable diagram and examples. 10
९7. (5)
(છ)
(0)
९8. (৪)
(b)
(૦)
BJKE-U-BTN
Describe the floral features of the family Asteraceae with floral formula
and floral diagrams. Explain why this family is considered as highly
evolved among Angiosperms. 10+5=15
Distinguish between bisporic embryo sac and tetrasporic embryo sac.
Explain with suitable diagrams the various types of tetrasporic embryo
sacs. 5+10=15
What are the factors that affect the yield and viability of protoplast
during protoplast culture ? 10
Classify fibers with examples based on : 7+8=15
(i) origin and structure.
(1) their commercial uses.
What are the different methods of micropropagation ? Discuss
the advantages and disadvantages of in vivo and in _ vitro
micropropagation. §+10=15
What are hallucinogens ? Explain giving examples of Marijuana and its
bioactive compounds. 10
