UPSC IFS 2018 Question Paper for Zoology Paper - I

1.F.S. EXAM-(11/1) 2018 FSI-P-ZOLY

ZOOLOGY

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. l 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.

SECTION A

Ql. Write a brief account of the following: 8x5=40

Sol-gel hypothesis of protozoan locomotion 8

Spicules in Porifera 8

Parasitic mode adaptations in nematodes 8

Ciliary mode of feeding in Branchiostoma 8

Phenomenon of Pedomorphosis in Amphibia 8

FS I-P-ZOLY

Q2. (a) Schematically present the process of conjugation in Paramoecium sp.
Comment on its biological significance. 10+5=15

Define metagenesis. Elaborate the process of metagenesis in Obelia with
suitable diagram. 3+12=15

Sphenodon is considered to be a living fossil — Justify. 10

Q3. (a) Explain the neuro-endocrine regulation of insect metamorphosis with
suitable illustrations. Comment on the role of JH (Juvenile Hormone) in
insect metamorphosis. 10+5=15

Give an account of accessory respiratory structures in fishes with a note
on their biological significance. 15

What is emergency hormone ? How is the secretion of this hormone
being regulated? 4+6=10

Q4. (a) Give a comparative account of aortic arches in different Vertebrates with
suitable illustrations. 15

Peripatus is a living connecting link between Annelida and Arthropoda.
Explain. 15

Give the scientific name of one amphibious mollusc. How does it respire
in aquatic medium? 2+8=10

FSI-P-ZOLY 2

SECTION B

Q5. (a) Differentiate between culture and capture fisheries. 8

Comment on the prospects of Sericulture in India. 8

Write a brief note on Climax Community. 8

Distinguish between hormone and pheromone with a note on alarm
hormone. 8

Write a brief note on the principle and applications of a
spectrophotometer. 8

Q6. (a) Give an account on the forest types of India. Why do tropical rainforests
support a large number of life forms? 8+7=15

What is population growth ? Delineate different factors affecting
population growth. Distinguish between "J" shaped and "S" shaped
growth curve with examples. 2+8+5=15

Mention the aims and objectives of "Project Tiger". Comment on its
limitations. 5+5=10

Q7. (a) Why do birds migrate ? Give an account of different methods of
navigation during bird migration. 6+9=15

Briefly narrate different techniques of courtship display among birds. 15

Give an account on the echolocation in bats. 10

Q8. (a) Mention the nature of damage caused by Pyrilla sp. to sugarcane.
Describe the lifecycle stages of the said pest with proper diagram
Suggest measures to control the pest. 5+6+4=15

Name important malaria vectors of India. Elaborate the life cycle of any
malaria vector of India. How can the transmission of malaria be
checked? 4+8+3=15

What is null hypothesis ? Elaborate the application of chi square test in
biology. 4+6=10

FSI-P-ZOLY 3