ZOO/V/08 Student's Copy
2 0 1 8
Pre-CBCS
5th Semester
ZOOLOGY
EIGHTH PAPER
Entomology
Full Marks 55
Time 2½ hours
PART A—OBJECTIVE
Marks 20
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 5
Tick the correct answer in the brackets provided 1×5=5
1. Butterfly belongs to the order of
Isoptera
Orthoptera
Hymenoptera
Lepidoptera
/324 1 Contd.
2. Sponging type of mouthparts is found in
butterfly
honeybee
housefly
grasshopper
3. Earias vitella is a pest of
paddy
cotton
pulses
sugarcane
4. There are total six types of castes in
ant
honeybee
termite
wasp
5. Exchange of food among colony members by mouth is called
ecdysone
swarming
pheromone
trophallaxis
SECTION—B
Marks 15
Write short notes on the following 3×5=15
1. Major insect pests
2. Body wall of insects
3. Ametabolous metamorphosis
4. Importance of honey
5. Parasitic insects

PART B—DESCRIPTIVE
Marks 35
The questions are of equal value
1. Write the methods of collection and preservation of insects.
OR
Describe any two of the salient features of the major insect pests of paddy.
2. Explain the respiratory system of insect with a labelled diagram.
OR
Describe female reproductive system of insect with suitable diagram.
3. Differentiate between hemimetabolous and holometabolous metamorphosis.
OR
Give an account of caste system in insects.
4. Explain the life cycle of lac insect with a diagram.
OR
Write in detail the mechanism of action of insect hormones.
5. Give an account on predatory insects and their effects.
OR
Explain the chemical control of insects with its advantages.