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Part A: Vocabulary
_______1.
Branching networks of hollow passages that carry
air throughout the body
Chemical odor signal given off by an animal
a. Appendage
Form of asexual reproduction in which an
organism develops from an unfertilized egg
Openings through which air enters and leaves the
tracheal tubes
Any structure, such as a leg, that grows out of the
body of an animal
c. Pheromone
_______6.
Fused head and thorax region in some arthropods
a. Book lungs
_______7.
Excretory organ of terrestrial arthropods
b. Cephalothorax
_______8.
Air-filled chamber containing leaflike plates that
serve for gas exchange
Shedding of the old exoskeleton
c. Malpighian
tubules
d. mandible
_______2.
_______3.
_______4.
_______5.
_______9.
_______10. Jaw of an arthropod
b. Parthenogenesis
d. Spiracles
e. Tracheal tubes
e. Molting
Part B: Multiple Choice
1. The characteristic that most distinguishes arthropods from other invertebrates is
a. the coelom
b. jointed appendages and an exoskeleton
c. the endoskeleton
d. bilateral symmetry
2. Before an arthropod molts, a new exoskeleton
a. grows on top of its old one
b. must be found
c. cannot grow
d. grows beneath its old one
3. Aquatic arthropods exchange gases through
a. tracheal tubes
b. gills
c. their exoskeleton
d. book lungs
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4. When a spider bites, it uses its
a. chelicerae
b. mandibles
c. pedipalps
d. silk glands
5. In spiders, the exchange of gases takes place in
a. book lungs
b. lungs
c. gills
d. spiracles
6. Most insects have one pair of _____________ that are used to sense vibrations, food,
and pheromones in the environment.
a. pedipalps
b. wings
c. antennae
d. eyes
7. The typical tick body consists of ___________ segment(s).
a. one
b. two
c. three
d. four
8. Crabs, lobsters, shrimps, and pill bugs are members of the class
a. Insecta
b. Myriapoda
c. Crustacea
d. Arachnida
9. The stages of incomplete metamorphosis are
a. egg, larva, pupa, adult
b. larva, pupa, nymph
c. egg, larva, adult
d. egg, nymph, adult
10. An arthropod’s exoskeleton is made up primarily of
a. calcium
b. cartilage
c. chitin
d. silicon
11. A butterfly excretes wastes through
a. spinnerets
b. Malpighian tubules
c. spiracles
d. tracheal tubes
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12. __________ are used by arthropods for breathing.
a. Pedipalps
b. Spiracles
c. Chelicerae
d. Spinnerets
13. Crustaceans are different from other arthropods because they have two ________
used for sensing.
a. jointed appendages
b. pairs of antenna
c. pedipalps
d. walking legs
14. Jointed appendages allow for greater __________ and more powerful movements.
a. size
b. molting
c. flexibility
d. camouflage
15. Molting occurs when an arthropod sheds its old ___________ and grows a new one.
a. shell
b. endoskeleton
c. exoskeleton
d. skin
16. The middle stage of incomplete metamorphosis is the __________.
a. larva
b. egg
c. pupa
d. nymph
17. The fact that horseshoe crabs have remained relatively unchanged for over 200
million years indicates that
a. natural selection has not taken place
b. they must reproduce by parthenogenesis
c. they have very little genetic diversity
d. their environment has changed very little
18. Insect larvae are well-adapted for
a. reproducing
b. burrowing
c. feeding
d. jumping
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Force / Stretch Required to Break Silk of
Various Spiders
A
B
C
Increasing
force to
breaking
point
D
E
Increasing stretch
19. Which spider’s silk stretched the most before breaking?
20. Which spider’s silk requires a force greater than the others to break?
21. You want to make a fabric of spider silk that has a good deal of stretch that is also
pretty strong. Which spider silk will give you this property?
22. A species of spider has an adaptation that allows it to follow the pheromone trail of a
species of ant. This adaptation is probably found on its
a. chelicerae
b. mandibles
c. simple eyes
d. pedipalps
23. The structure of ___________ on insects varies depending upon their source of food.
a. chelicerae
b. mandibles
c. simple eyes
d. pedipalps
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24. An eye made of multiple lenses found in arthropods is called a
a. simple eye
b. complex eye
c. compound eye
d. telescopic eye
25. A structure capable of seeing only light and dark is a
a. simple eye
b. complex eye
c. compound eye
d. telephoto eye
Part C: Identify each specimen as belonging to the class Arachnidae, Crustacea,
Myriapoda, or Insecta.
Part D: Match the term with the part of the insect.
a.
b.
c.
d.
e.
f.
antennae
compound eye
legs
mandibles
spiracles
wings
Part E:
Use the following dichotomous key to identify the bean on your table. List all the
choices that you make at each step to come to your conclusion.
For example, if the bean was a kidney bean, a completely correct answer would read:
“kidney bean: 1b, 2b, 3a, 4b”
1a. Bean spherical (round)
1b. Bean elliptical or oblong
Garbanzo bean
Go to 2
2a. Bean white
2b. Bean has dark pigments (colors)
White northern
Go to 3
3a. Bean evenly pigmented
3b. Bean pigmentation mottled
(speckled)
Go to 4
Pinto bean
4a. Bean black
4b. Bean reddish-brown
Black bean
Kidney bean
Part F: Essay
On the back of your answer sheet, list the seven taxa in order from most broad to
most specific.