Download 09PP11Exam1a - Semester exam 1

Semester Examination 1
Module: Fundamentals of Plant Protection
Unit: Entomology
Time 1 hr
Marks: 100
Date: 3/09/2009
NAME:__________________
Answer all the questions:
1. Give five reasons (key words only) why insects in general are so diverse and
successful? (5)
2. List 5 beneficial effects and 5 detrimental effects of insects? (10)
3. Name 5 characteristic features of arthropods. (5)
4. List 3 distinguishing features of the class Arachnida and name 2 organisms that
belong to the class. (5)
5. Give 2 similarities and 3 differences of the diplopods and chilopods. (5)
6. Arrange the taxonomic levels in the right sequence (start with Kingdom):
kingdom, species, class, phylum, genera, order, family. (5)
7. Differentiate between pterygots and apterygots. Name 3 orders under apterygota.
(5)
8. Pick up the relevant insect/s to match the Orders given in the table: (10)
ORDER
a. Odonata
b. Isoptera
c. Orthoptera
d. Hemiptera
e. Thysanoptera
f. Neuroptera
g. Coleoptera
h. Diptera
i. Lepidoptera
j. Hymenoptera
INSECT
(Flies, Mosquitoes), (Beetles), (Mayflies),
(Dragonflies), (Cockroaches), (Moths,
Butterflies), (Termites), (Mantids), (Lace
wings, Antlions), (Grasshoppers,
Crickets etc.), (Stoneflies), (Earwigs),
(Stick insects), (Web-spinners),
(Sucking lice), (Wasps, Bees, Ants),
(Psocids, Book lice), (Bugs), (Thrips).
9. Draw an insect head and show the following parts:
Frons, clypeus, gena, vertex, ocelli (5)
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10. Name the type of antenna: (5)
Name
Appearance
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
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11. Fill in the blanks with the type of mouthpart (5)
1. Mandibulate
____________
2. Haustellate
a) Stylet
____________
b) Non-stylate
____________
____________
____________
____________
12. Draw a labeled diagram to show the cross-section of the piercing-sucking mouthpart.
The following parts should be shown: labium. maxilla, mandibles, food channel, salivary
duct. (5)
13. Make a sketch of the insect thorax to show the following parts: notum, sternum,
pleuron, forewing attachment position, hindwing attachment position. (5)
14. Draw an insect leg to show at least 5 important parts. (5)
15. Fill in the blanks: (5)





Unmodified legs are used for walking and are called___________.
Digging legs are called ___________.
Swimming legs are called _________.
Jumping legs are called _________.
Grasping legs are called ________.
16. Define the following types of wings and give examples of insects that have such type
of wings: elytra, hemelytra, tegmina, halteres, fringed wings. (10)
17. Define the following: chrysalis, cocoon, instar, ametabolous, naiads (5)
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