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Indian Forest Services (Main)
Examination-2025 DJSM-U-BTN
BOTANY
Paper - 1
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.
Answers must be written in ENGLISH only.
Neat sketches may be drawn, wherever required.
DJSM-U-BTNY 1
Ql. (a)
(b)
(८)
0)
(9)
९2. (8)
(b)
(c)
Q3. (2)
(b)
(૦)
९4. (a)
(b)
(૦)
(118%) 2921790 123101 18511
CO ENON A
What are the major differences between Moss and Liverworts ? 8
What are Biocides ? Describe their merits and demerits. 24+343=8
Blue-green algae are also referred to as bacteria. Explain their algal and
bacterial features. 8
Give the scientific name of the organisms used for the production of: 2x4=8
(i) Ethyl alcohol from glucose
൮ Citric acid
(1) Bacitracin
(iv) Cellulase
Name the order of Gymnosperms whose members are known as “SEED
FERNS”. Give its general characteristics. 2+6=8
Describe the ecological and horticultural applications of Bryophyta. 5+5=10
Draw and label the thallus structure of Laminaria. Describe the sexual
reproduction in Laminaria. 55705757
Describe the structure of female gametophyte of Cycas. Explain the
changes in the ovule of Cycas after fertilization. 7+8=15
Differentiate between Gymnosperms and Angiosperms with reference to
their vasculature, fertilization, reproductive structures and seed. 10
Name the causal organism of Leaf spot or Tikka disease of groundnut.
What are the symptoms of this disease ? Describe its disease cycle and
management. 2454257577
Describe the major characteristics of Ophioglossaceae. Draw and
describe the development of spike and sporangium in Ophioglossum. 5+10=15
Describe the role of fungal enzymes and toxins in the development of
plant diseases. 5+5=10
What are the salient features of Zygomycetes ? With the help of suitable
diagrams, describe the sexual reproduction in Mucor. 5+10=15
What is the difference between Manoxylic and Pycnoxylic wood ? Draw
well-labelled diagrams of Radial longitudinal section and Tangential
longitudinal section of long shoot of Pinus. 5+10=15
DJSM-U-BTNY 2
Q5. (5)
(b)
(૦)
(ત)
(e)
Q6. (a)
(b)
(0)
SECTION B
Write short notes on the following : 44+4=8
(i) Adventive embryony
(ii) | Haploid parthenogenesis
Explain successive stages in the development of male gametophyte in
angiosperms. 8
Explain the concept of cellular totipotency in plants. How is this
property utilized in plant tissue culture ? 44+4=8
Write the botanical names of any two dye-yielding plants with family and
mention the plant parts from where the dyes are obtained. 4+4=8
What is Herbarium ? How does it act as a source of information for
plants ? Differentiate between herbarium and virtual herbarium. 2+4+2=8
Draw and explain anomalous secondary growth in Boerhavia diffusa and
Salvadora sp. 5+5=10
Describe the floral characters, and draw floral diagrams and floral
formulae of subfamilies Papilionaceae, Caesalpinieae and Mimoseae of
family Fabaceae. 5+5+5= 15
Mention the botanical name, family with morphology of the parts used
for the following : 3xd=15
@ Fig
(ii) Tea
(1) Oats
(iv) Oil palm
(v) Clove
DJSM-U-BTNY 3
९7. (a)
(b)
(૦)
౧. (a)
(0)
(6)
Write an account on ethnobotanical research in India. 10
Describe the androecium of the following families and give their floral
formulae : 5x 38=15
(i) Malvaceae
Gi) Brassicaceae
(ఘు Orchidaceae
(iv) Asclepiadaceae
(v) | Verbenaceae
“Plant tissue culture technology can be utilized to save endangered and
threatened plants.” Substantiate the statement. 15
Why are botanical gardens considered as “outdoor laboratories” ? 10
Write an account on cell suspension culture. What are its applications ?
10+5=15
How are protoplasts utilized to obtain hybrids with potential agronomic
value ? Give two examples. 10+5=15
DJSM-U-BTNY 4
