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Unit 2 - Practice Quiz

ENT102 50 Questions
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1 Which of the following is the non-cellular, outermost layer of the insect integument?

A. Epidermis
B. Basement membrane
C. Cuticle
D. Haemolymph

2 The primary chemical constituent of the insect procuticle, chitin, is a polymer of:

A. N-acetylglucosamine
B. Glucose
C. Amino acids
D. Lipoproteins

3 Which layer of the epicuticle is responsible for preventing water loss and is critical for insect survival in dry environments?

A. Cement layer
B. Wax layer
C. Cuticulin layer
D. Inner epicuticle

4 The separation of the old cuticle from the underlying epidermis during molting is termed:

A. Ecdysis
B. Apolysis
C. Sclerotization
D. Melanization

5 Which hormone is primarily responsible for initiating the molting process?

A. Juvenile Hormone (JH)
B. Ecdysone
C. Bursicon
D. Eclosion hormone

6 The hardening and darkening of the new cuticle after molting is known as:

A. Digestion
B. Phagocytosis
C. Sclerotization
D. Chitinization

7 The insect body is divided into three functional regions (tagmata). They are:

A. Head, Thorax, Abdomen
B. Cephalothorax, Abdomen, Tail
C. Head, Trunk, Pygidium
D. Prosoma, Mesosoma, Metasoma

8 Which type of head orientation is characterized by mouthparts directed downwards at a right angle to the body axis (e.g., Grasshoppers)?

A. Prognathous
B. Opisthognathous
C. Hypognathous
D. Entognathous

9 In prognathous insects, the mouthparts are directed:

A. Backwards between the legs
B. Downwards
C. Forwards
D. Sideways

10 The Opisthognathous head orientation is typically found in:

A. Coleoptera (Beetles)
B. Orthoptera (Grasshoppers)
C. Hemiptera (True bugs)
D. Odonata (Dragonflies)

11 The internal skeletal structure of the insect head that provides rigidity and muscle attachment points is called the:

A. Tentorium
B. Furca
C. Phragma
D. Apodeme

12 The basal segment of the insect antenna that articulates with the head capsule is the:

A. Pedicel
B. Flagellum
C. Scape
D. Meriston

13 Johnston's organ, a sensory structure capable of detecting flight speed and sound, is located in which antennal segment?

A. Scape
B. Pedicel
C. First flagellomere
D. Terminal segment

14 Termites possess bead-like antennae where segments are globular and uniform in size. This type is called:

A. Filiform
B. Serrate
C. Moniliform
D. Setaceous

15 The Geniculate or elbowed antenna is characteristic of:

A. Honey bees and Ants
B. Butterflies
C. House flies
D. Cockroaches

16 Male mosquitoes possess feathery antennae with whorls of long hairs used to detect female wing beats. This type is known as:

A. Pilose
B. Plumose
C. Pectinate
D. Clavate

17 Which antennal type is clubbed with a gradual thickening towards the tip?

A. Capitate
B. Clavate
C. Lamellate
D. Aristate

18 The bristle-like modification on the antenna of a House fly is called the:

A. Style
B. Arista
C. Pecten
D. Funiculus

19 The insect thorax consists of three segments. Which of the following correctly lists them from anterior to posterior?

A. Metathorax, Mesothorax, Prothorax
B. Prothorax, Metathorax, Mesothorax
C. Prothorax, Mesothorax, Metathorax
D. Mesothorax, Prothorax, Metathorax

20 Which thoracic segments typically bear wings in pterygote insects?

A. Prothorax and Mesothorax
B. Mesothorax and Metathorax
C. Prothorax and Metathorax
D. All three thoracic segments

21 The dorsal plate of a thoracic segment is called the:

A. Sternum
B. Pleuron
C. Notum
D. Tergum

22 The generalized insect abdomen typically consists of how many segments (including reduced/modified ones)?

A. 5-6
B. 8-9
C. 10-11
D. 15-20

23 Which of the following appendages are found on the 11th abdominal segment and serve sensory functions?

A. Styli
B. Cornicles
C. Cerci
D. Furcula

24 The 'upper lip' of the generalized insect mouthparts is the:

A. Labium
B. Maxilla
C. Labrum
D. Mandible

25 In chewing mouthparts, which structure is primarily responsible for grinding and cutting food?

A. Maxillae
B. Mandibles
C. Labium
D. Hypopharynx

26 The 'tongue-like' structure located centrally in the preoral cavity is the:

A. Epipharynx
B. Hypopharynx
C. Paraglossa
D. Galea

27 Which mouthpart type is characteristic of House flies?

A. Piercing and sucking
B. Chewing and lapping
C. Sponging
D. Siphoning

28 In the piercing-sucking mouthparts of a mosquito, the structures that pierce the skin (stylets) are modifications of:

A. Labrum only
B. Mandibles only
C. Labium only
D. Mandibles, Maxillae, Labrum-epipharynx, and Hypopharynx

29 Butterflies and moths possess which type of mouthparts?

A. Rasping and sucking
B. Siphoning
C. Chewing and lapping
D. Sponging

30 Chewing and lapping mouthparts are found in:

A. Honey bees
B. Cockroaches
C. Bed bugs
D. Thrips

31 Rasping and sucking mouthparts are unique to:

A. Hemiptera
B. Thysanoptera (Thrips)
C. Diptera
D. Hymenoptera

32 Identify the correct sequence of insect leg segments starting from the body (proximal to distal):

A. Coxa, Trochanter, Femur, Tibia, Tarsus, Pretarsus
B. Coxa, Femur, Trochanter, Tibia, Tarsus, Pretarsus
C. Trochanter, Coxa, Femur, Tibia, Tarsus, Pretarsus
D. Coxa, Trochanter, Tibia, Femur, Tarsus, Pretarsus

33 The legs of a Cockroach are adapted for running. This modification is termed:

A. Saltatorial
B. Ambulatorial
C. Cursorial
D. Fossorial

34 Saltatorial legs, adapted for jumping (e.g., Grasshopper), typically exhibit an enlargement of which segment?

A. Coxa
B. Femur
C. Tibia
D. Tarsus

35 Raptorial legs are modified for grasping prey and are found in:

A. Preying Mantis
B. Mole Cricket
C. Water Boatman
D. Head Louse

36 Fossorial legs are modified for ________ and are found in Mole Crickets.

A. Swimming
B. Digging
C. Jumping
D. Clinging

37 The pollen basket (Corbicula) found on the hind legs of worker honey bees is a modification of the:

A. Femur
B. Tibia
C. Basitarsus
D. Trochanter

38 Natatorial legs are flattened and fringed with hairs for swimming. These are found in:

A. Water beetles and Water bugs
B. Cockroaches
C. Termites
D. Fleas

39 The forewings of grasshoppers and cockroaches are leathery and parchment-like, known as:

A. Elytra
B. Hemelytra
C. Tegmina
D. Halteres

40 Hard, sclerotized forewings that serve as protective covers in Beetles (Coleoptera) are called:

A. Tegmina
B. Elytra
C. Scales
D. Membranes

41 In Diptera (True flies), the hind wings are modified into knob-like structures used for balancing, called:

A. Halteres
B. Frenulum
C. Hamuli
D. Jugum

42 The term Hemelytra refers to the forewings of True Bugs (Heteroptera), which are:

A. Entirely membranous
B. Entirely hard
C. Basally hard/leathery and distally membranous
D. Reduced to scales

43 Tiny hooks present on the anterior margin of the hind wing that attach to the forewing in Hymenoptera (Bees/Wasps) are called:

A. Fibula
B. Hamuli
C. Jugum
D. Frenulum

44 In the Frenulum-Retinaculum wing coupling mechanism found in moths, the Frenulum is located on the:

A. Anterior margin of the Forewing
B. Posterior margin of the Forewing
C. Humeral angle of the Hindwing
D. Anal angle of the Hindwing

45 The Jugum is a finger-like lobe used for wing coupling in primitive Lepidoptera. It projects from the:

A. Posterior margin of the Forewing
B. Anterior margin of the Hindwing
C. Posterior margin of the Hindwing
D. Thorax

46 In the Comstock-Needham system of wing venation, the unbranched vein usually forming the anterior margin of the wing is the:

A. Subcosta (Sc)
B. Costa (C)
C. Radius (R)
D. Media (M)

47 Which vein typically follows the Radius and is often divided into anterior and posterior branches ( to )?

A. Cubitus
B. Media
C. Anal
D. Subcosta

48 The triangular area at the base of the wing, often separated by a fold, is called the:

A. Remigium
B. Vannus
C. Jugum
D. Axillary region

49 Small window-like clear spots on the wings (as seen in some moths) are called:

A. Fenestra
B. Pterostigma
C. Areola
D. Cell

50 The opaque, pigmented spot near the costal margin of the wing in Dragonflies and Damselflies is the:

A. Arculus
B. Nodus
C. Pterostigma
D. Triangle
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