Exam 2 — Version A

 1.  T           6.  T           11.  C           16.  A
 2.  F           7.  F           12.  C           17.  A
 3.  T           8.  T           13.  B           18.  C
 4.  T           9.  F           14.  D           19.  A
 5.  T          10.  T           15.  B           20.  D

21.  At 20 degrees, the larvae would accumulate 14 degree-days
     each day (20-6=14).  Over four days @ 20 degrees they would
     accumulate 56 degree days (14x4=56).  Therefore, the larvae
     must have accumulated 420-56=364 DD before they were
     collected from the body.

22.  D          27.  A
23.  C          28.  D
24.  B          29.  A
25.  B          30.  C
26.  A          31.  E

32.  Torpor and quiescence are directly induced by unfavorable
     environmental conditions (e.g. cold temps).  Diapause is
     genetically programmed and occurs prior to the onset of
     unfavorable conditions.

33.  An ocellus has a single corneal lens (dioptric apparatus)
     with several receptors (rhabdoms) beneath it.  A compound
     eye has a separate dioptric apparatus for each of many

34.  All worker bees are adult females rendered sexually sterile
     by the effects of queen pheromone.  Worker termites are
     immatures (both male and female) and potentially could
     molt into soldiers or reproductives.

35.  Batesian mimics are palatable, but they resemble another
     species that is unpalatable.  Mullerian mimics are all
     unpalatable; they resemble each other so all benefit
     when a predator learns to avoid them.

36.  Taxis is "directed" movement toward or away from a 
     stimulus.  It requires input from a pair of sensory
     receptors.  Kinesis is "undirected" -- a change in
     rate of locomotion or frequency of turning in response
     to a stimulus.  Only one receptor is needed.

37.  Line #1 (Subesophageal) cross out Heart, Crop, & Salivary glands
     Line #2 (Protocerebrum) cross out Antennae & Labrum
     Line #3 (Frontal) cross out Mandibles, Maxillae, & Palps
     Line #4 (Metathoracic) cross out Midgut, Proventric, & Cerci
     Line #5 (Caudal) cross out Wings, Legs, & Rectum

38.  Essay:  A thorough answer would include a discussion of
     at least five of the following points --
        a.  spectral sensitivity -- esp. red and UV
        b.  true color vision -- bichromatic vs. trichromatic
        c.  mosaic image vs. true image
        d.  flicker fusion frequency -- motion detection
        e.  substrate vibrations (chordotonal organs)
        f.  sensitivity to high frequency sound vibrations
        g.  sensitivity to chemical substances -- esp. pheromones
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