ENTOMOLOGY 205
Exam 2 October 31, 2001
NAME: _________________________________ SS#: ____________
ILLEGIBLE ANSWERS WILL NOT BE GRADED
Read directions and questions carefully. Think before you respond. Respond in context of course. GOOD LUCK. HONESTY IS EXPECTED.
I. FILL-INS
1. A ___________________________(type of chemical) is typically produced in a (an) ________________ gland of a FEMALE or MALE (Circle one) which upon release outside the body serves to attract the opposite sex for ____________________ behavior. A female wasp may mark her egg laying site within an aphid body with a (an) __________________ chemical, an example of _________________________ behavior.
2. The first insect fossil is approximately ___________ million years old but fossils of the arthropod _________________________ predate it by 200 million years. Winged insect fossils appear in the _______________ era, _______________ period of the geological time table. Fossils of insects with complete metamorphosis can be found in the _____________ period. The presumed ancestor of the insect is a (an) _______________..
3. Oxygen enters the insect body via __________________ and while inside the insect body
passes through ____________________________ held open by ____________________.
The oxygen ultimately goes to ____________________________ within the body where
it is used and converted to the waste product __________________________________
4. The haploid female egg is fertilized by male _______________ in the ________________
of the female before the egg passes outside (termed ____________________) to complete
development; a good mom places the egg _________________________________. A
diploid egg (condition termed _______________________) is produced in ___________.
(name insect) of order _________________________.
5. What specific body structure does the following functions in insects:
A. Engulfs foreign bodies/pathogens within the hemocoel? _____________________
B. Stores male sperm in the female body? ___________________________________
C. Perceives smell on insect antennae? ______________________________________
D. Carries sperm to female? ______________________________________________
E. Carries electrical message from C above to CNS? ___________________________
6. In complete metamorphosis the signal to molt is the chemical ____________________
which starts ___________________ expanding. They release ______________________ which causes the cuticle layer ____________________________ to dissolve. Before actually growing to a larger size a new _____________________________ is produced and then the insect expands into its new exoskeleton by use of _____________________
7. A thornbug (order _____________________) female places 100+ eggs into bark and then
she _____________________. How did the male know a female was receptive for mating?
________________________________________. Females produce a "ch" sound signal that her _________________________ perceive via _______________________________ .
8. Honey bee dancers are detected via _________________ not ___________________ in the normally dark hive. How is distance to food site encoded by a dancing bee? ________________.What else (besides dances) will help enable recruit worker bees find the food resource?______________________________. In diagram to left where is food? A, B or C (Circle one)
9. Diagram to right above illustrates ______________. Number D is order ______________
In space here draw the next life stage:
This is ___________________ metamorphosis.
10. Fireflies (order _________________________) light up with chemical ________________
In most species it is used by _________________ to locate opposite sex for ____________ but one species answers with a "false' signal to ____________________________
11. Aposomatic coloration pattern means ______________________. It is used by some insects to communicate ______________________or ________________________ to potential predators. Two examples of defensive coloration patterns in insects might be:
1. ________________________________ and 2. __________________________
12. A kinesis type of orientation behavior might be __________________________ whereas a
positive taxis orientation might be _________________________________. What is the
stimulus in the second blank above? _______________________. Give an example of how
an insect might exhibit learned orientation behavior:
13. Name the internal system where you would find the following:
reflex arc _________________________________________________
uric acid formation _________________________________________
food storage _______________________________________________
food transport to cells ________________________________________
skeletal and visceral types _____________________________________
14. Monarch and painted lady adults _______________ by flying to overwintering sites and next spring they reappear in our region in the ________________ stage. Monarchs are not e eaten by hungry predatory birds because they ___________________________ How do we tag a monarch or painted lady adult _______________________. How do they know to leave DE in the fall?
15. Explain 2 (two) of these terms: Do only 2 - use back of page for more space.
flash pattern amber fossil digestive symbiont mechanoreceptor monophageous
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II. DIAGRAMS/VISUALS Answer all 5 questions.
16. ( 7 points) A typical insect is diagramed below in longitudinal section. ID structures A thru D and for E thru G indentify the function of the structure.
ID structure
A. __________________ What is function
B. __________________ E. ____________________ C. __________________ F. _______________________
D. ___________________ G.______________________
17. ( 3 pts) Diagram a typical orb web of a spider such as the common garden spider or indirect flight muscles of mesothorax of a typical flying insect :
18. ( 7 pts) Fill in blanks for flow diagram below:
Both peppered moths and flies were used to illustrate modern evolution:
________________________ was present in the gene pools of both moths and flies
(In peppered moths this was shown in what way? ___________________)
Females produced _____________ eggs in both insects but not all survived to adult stage
due to ________________________________ selection
Therefore ___________________ changed in a few generations in both moths and flies? (In flies the change was from ________________ to __________________)
19. (4 pts) Two things each of these diagrams were used to illustrate were:
_____________________________ _____________________________
_____________________________ ______________________________
20. ( 4pts) Label A thru D on this diagram illustrating communication of messages in metamorphosis
.