Unit 3 - Practice Quiz

1 Which of the following terms describes the type of metamorphosis found in silverfish (Order Thysanura), where the young look exactly like adults except for size and sexual maturity?

2 Which endocrine gland is responsible for the secretion of the Juvenile Hormone (JH)?

3 In the context of insect development, what is diapause?

4 What type of larvae are characterized by having three pairs of thoracic legs but no abdominal prolegs, often found in beetles?

5 Which type of pupa has its appendages firmly glued to the body wall, common in Lepidoptera (butterflies and moths)?

6 The insect digestive system is divided into three main regions. Which region is lined with cuticle and is primarily responsible for ingestion, storage, and grinding of food?

7 What is the primary function of the peritrophic membrane in the insect midgut?

8 Which structure in the alimentary canal of fluid-feeding insects (like Homopterans) allows excess water to bypass the absorptive midgut to concentrate nutrients?

9 The insect circulatory system is described as 'open'. What is the name of the body cavity filled with haemolymph?

10 What are the lateral openings in the dorsal vessel (heart) through which haemolymph enters?

11 Which muscles are responsible for supporting the dorsal vessel and aiding in the flow of haemolymph?

12 What is the primary nitrogenous waste product excreted by terrestrial insects to conserve water?

13 Which organs are the primary excretory structures in insects, functioning similarly to kidneys?

14 In the cryptonephridial system found in some beetles and moth larvae, the distal ends of the Malpighian tubules are closely associated with which organ?

15 The external openings of the tracheal system found on the pleuron of the thorax and abdomen are called:

16 What keeps the tracheal tubes from collapsing under pressure?

17 Which part of the respiratory system acts as the direct site of gas exchange with tissues?

18 Aquatic insects that carry a permanent film of air held by hydrofuge hairs for respiration utilize a mechanism known as:

19 The basic functional unit of the insect nervous system is the:

20 The insect brain (supraesophageal ganglion) consists of three fused ganglia. Which part innervates the eyes?

21 Which part of the insect brain innervates the antennae?

22 The Visceral Nervous System (or Stomatogastric Nervous System) primarily controls:

23 Which hormone triggers the molting process by stimulating the separation of the old cuticle?

24 Which neurohormone is responsible for the tanning and hardening (sclerotization) of the new cuticle after molting?

25 In the male reproductive system, sperm is stored in the:

26 What is the function of the spermatheca in female insects?

27 Which type of ovariole lacks nutritive cells (nurse cells), with the oocyte obtaining nutrients solely from the follicular epithelium?

28 A form of asexual reproduction where the egg develops into a new individual without fertilization is called:

29 What is Arrhenotoky?

30 The reproduction phenomenon where a single egg divides to produce multiple embryos (often in parasitic wasps) is known as:

31 Which term describes insects that give birth to live larvae or nymphs instead of laying eggs?

32 Paedogenesis is defined as:

33 The individual functional unit of a compound eye is called a(n):

34 What is the specific function of the Johnston’s organ located in the pedicel of the antenna?

35 Tympanal organs are responsible for:

36 Simple eyes found in holometabolous larvae (like caterpillars) are called:

37 Scolopidia are the fundamental units of which type of sensory organ?

38 Where are gustatory (taste) receptors primarily located in butterflies?

39 The Proventriculus (gizzard) is most highly developed in insects that eat:

40 What is the function of the rectal pads or papillae?

41 Which type of larvae is legless and often has a reduced head capsule, typical of house flies?

42 A Coarctate pupa is enclosed within:

43 The process of breakdown of larval tissues during metamorphosis is called:

44 Which cells in the insect haemolymph are responsible for encapsulation of large parasites?

45 Neurosecretory cells in the brain produce PTTH (Prothoracicotropic Hormone). What is its target organ?

46 In the female reproductive system, the accessory glands often secrete a substance to protect eggs. In cockroaches and mantids, this forms a(n):

47 Campodeiform larvae are:

48 What is the function of the intima in the tracheal system?

49 The distinct light-refracting structure in an ommatidium consisting of a lens and a crystalline cone is the:

50 An insect with an Exarate pupa has: