Quiz 2 – Version C

True/False:

 1.  The exocuticle is the outermost layer of the exoskeleton.

 2.  In chewing (mandibulate) insects, the labium bears palps.

 3.  Insects never have more than twelve abdominal segments.

 4.  The mesepimeron lies in front of the metepisternum.

 5.  Muscles that depress a fly's mesonotum will elevate its wings.

Multiple Choice:

 6.  Chitin is a very important part of the insect's exoskeleton
     because:
     A.  It is impermeable to water.
     B.  It is rigid and inflexible.
     C.  It is not digested by common enzymes.
     D.  It is flexible and elastic.

 7.  Which structure lies below the frons and above the labrum?
     A.  Trochanter                  C.  Clypeus
     B.  Furca                       D.  Gena

 8.  Where is the genital opening found on a typical insect?
     A.  Just above the epiproct.
     B.  Just below the anus.
     C.  Between the paraprocts.
     D.  Inside the tentorium.

 9.  Parapsidal furrows are grooves found on the mesonotum of some parasitic wasps.  These grooves would be located:
     A.  Above and between the front wings.
     B.  Under the halteres.
     C.  On the epimeron.
     D.  No way to tell.

10.  Which part of the exoskeleton lies between the wax layer and the cement layer?
     A.  Exocuticle                  C.  Cuticulin layer
     B.  Endocuticle                 D.  None of these

11.  Which suture is NOT found on the head capsule?
     A.  Pleural suture              C.  Subgenal suture
     B.  Epistomal suture            D.  Frontal suture

12.  Which statement about valvulae is INCORRECT?
     A.  They are part of the female genitalia.
     B.  They lie just inside the valvifers.
     C.  They are arranged in three pairs.
     D.  They guide the egg during oviposition.

13.  The cibarium is best described as:
     A.  Thoracic muscles that move the wings.
     B.  A structure on the pretarsus.
     C.  The innermost layer of the epicuticle.
     D.  A muscular pump that sucks food into the mouth.

14.  Elastic regions of the exoskeleton:
     A.  Are generally known as sclerites.
     B.  Are found only at the joints.
     C.  Lack a well-defined exocuticle.
     D.  Contain high concentrations of quinones.

15.  Which layer(s) of the exoskeleton is(are) secreted by the epidermis?
     A.  Endocuticle                 C.  Epicuticle
     B.  Exocuticle                  D.  All of these

Matching:

Match each structure in the left column with its correct location in the right column.
16.  Labium
17.  Pedicel
18.  Coxa
19.  Femur
20.  Scape
A.  First antennal segment
B.  Second antennal segment
C.  Third antennal segment
D.  First leg segment
E.  Second leg segment
F.  Third leg segment
G.  First mouthpart
H.  Second mouthpart
I.  Third mouthpart
J.  Fourth mouthpart
Identify which part of the exoskeleton (right column) is primarily responsible for each of the functions in the left column.
21.  Resistance to abrasion
22.  Armor and strength
23.  Sensory perception
24.  Muscle attachment
25.  Flexibility
A.  Sclerites
B.  Apodemes
C.  Membranes
D.  Epidermis
E.  Cuticulin layer
F.  Wax layer
G.  Setae
H.  Sutures
I.  Cement layer


		
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