Modified True/False (Value 10) Indicate whether the statement is true or false. If false,
change the identified word or phrase to make the statement true.
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1.
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An adult starfish has radial symmetry. _________________________
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2.
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If an arthropod has antennae and its body is divided into a cephalothorax and an
abdomen, the arthropod is classified in the group called chelicerates.
_________________________
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3.
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One of the common features of arthropods is a tough endoskeleton.
_________________________
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4.
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The process in which an arthropod sheds its skeleton and manufactures a larger
one is called flexing. _________________________
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5.
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In a crayfish, the carapace is the part of the skeleton that covers the
abdomen. _________________________
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6.
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If an insect exists as a nymph before becoming an adult, the insect goes through
complete metamorphosis. _________________________
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7.
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The mouthparts of insects consist of three pairs of appendages, including a pair
of chelicerae. _________________________
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8.
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When an echinoderm exerts a pulling force on an object, muscles pull the centers
of the tube feet upward. _________________________
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9.
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An echinoderm’s water vascular system opens to the outside through the
ring canal. _________________________
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10.
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When a honeybee performs the round dance, it indicates that a food source has a
low energy value by changing direction less frequently than it would if the food were high
quality. _________________________
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Completion (Value 10) Complete
each statement.
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11.
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In the water vascular system of a sea star, the _________________________
connect the ring canal with the tube feet.
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12.
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Insects have ____________________ pairs of legs.
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13.
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In arthropods, the main nerve cord runs along the _________________________
surface of the body.
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14.
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An immature grasshopper resembles an adult grasshopper but does not have wings.
Therefore, grasshoppers undergo ____________________ metamorphosis.
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![nar001-1.jpg](ch28_files/nar001-1.jpg)
Figure
28–2
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15.
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On the chelicerate in Figure 28–2, the appendages labeled 2, which contain
fangs, are called ____________________.
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16.
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Within an insect society, particular tasks or roles are performed by groups of
individuals called ____________________.
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17.
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Each segment in the body of a trilobite had two ____________________ attached to
it.
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18.
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A typical primitive arthropod had many identical ____________________, each with
a pair of appendages.
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19.
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In an echinoderm, oxygen is carried throughout the body by the
_________________________ system.
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20.
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A uniramian with wings must be a(an) ____________________.
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Short Answer (Complete 2 of the below 5 questions) Value 4
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21.
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What will happen if a sea star is pulled into pieces?
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22.
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Suppose an insect lacked the skin glands that digest the inner part of the
exoskeleton. What effect would this condition have on the insect?
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23.
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How are mites and ticks harmful to humans?
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24.
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If you found a caterpillar of a species you had never seen before, why would it
be difficult to predict what the adult of that species looks like?
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25.
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How does a worker ant communicate the location of a food source to other ants in
the colony?
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Multiple Choice (Value 20) out of 21 questions Identify the choice that best completes the statement or answers
the question.
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26.
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The plates of the endoskeleton are reduced and contained inside a soft, muscular
body wall in
a. | brittle stars. | c. | sand dollars. | b. | sea urchins. | d. | sea cucumbers. |
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27.
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Insects are classified as
a. | uniramians. | c. | crustaceans. | b. | arachnids. | d. | chelicerates. |
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28.
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Which of the following is true of arthropods?
a. | They live only on land. | b. | They are all plant eaters. | c. | Fossil arthropods
appear recently compared to other animal groups. | d. | There are more species of arthropods than any
other group of animals. |
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29.
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What substance found in the skeleton of a desert-dwelling beetle is likely to be
absent from the skeleton of an aquatic beetle?
a. | protein | c. | wax | b. | silk | d. | chitin |
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30.
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The evolution of arthropods has led to
a. | fewer body segments and fewer specialized appendages. | b. | more body segments
and fewer specialized appendages. | c. | fewer body segments and more specialized
appendages. | d. | more body segments and more specialized appendages. |
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31.
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What does molting enable arthropods to do?
a. | to grow | c. | to eat | b. | to reproduce | d. | to breathe |
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32.
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The respiratory organ in terrestrial chelicerates is the
a. | book lung. | c. | book gill. | b. | pedipalp. | d. | chelicera. |
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33.
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In an echinoderm, the structure that operates like a living suction cup is
the
a. | nerve ring. | c. | stomach. | b. | madreporite. | d. | tube foot. |
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34.
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An example of a chelicerate is a
a. | crayfish. | c. | spider. | b. | lobster. | d. | centipede. |
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35.
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Which appendages are especially important in the classification of
arthropods?
a. | swimmerets | c. | antennae | b. | mouthparts | d. | legs |
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36.
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An arthropod is vulnerable to predators during the molting period because
a. | predators are more numerous during this period. | b. | its new exoskeleton
is soft. | c. | molting cannot occur without the assistance of predators. | d. | it must come out of
hiding to molt. |
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37.
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The echinoderms that look like warty, moving pickles are
a. | sea stars. | c. | sea cucumbers. | b. | feather stars. | d. | sea urchins. |
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38.
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Typical primitive arthropods had bodies that were composed of
a. | no segments. | c. | three segments. | b. | many segments. | d. | one segment. |
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39.
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In echinoderms, body parts usually occur in multiples of
a. | seven. | c. | three. | b. | two. | d. | five. |
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40.
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Sea lilies and feather stars
a. | are disk-shaped echinoderms that often burrow into the sand. | b. | feed by scraping
algae from rocks. | c. | make up the oldest class of
echinoderms. | d. | are the only echinoderms that live in fresh water. |
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41.
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The compound eyes of insects
a. | produce an image that is more detailed than what humans see. | b. | are located on the
thorax. | c. | are not very good at detecting movement. | d. | are made of many
lenses. |
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42.
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Which of these events is the first to happen when an arthropod molts?
a. | The animal fills with air or fluids. | b. | The animal pulls itself out of the original
skeleton. | c. | Skin glands digest the inner part of the skeleton. | d. | A new skeleton is
secreted. |
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43.
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To determine whether an animal is a cnidarian or an echinoderm, you
should
a. | determine its habitat. | b. | find out if it has a
backbone. | c. | study its embryonic development. | d. | discover whether it is aquatic or
terrestrial. |
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44.
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Which of the following is NOT a stage of complete metamorphosis?
a. | nymph | c. | larva | b. | pupa | d. | egg |
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45.
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Echinoderms are like vertebrates in that echinoderms
a. | are deuterostomes. | b. | have an anterior end and a posterior
end. | c. | have cephalization. | d. | are bilaterally symmetrical as larvae and as
adults. |
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46.
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An insect can detect minute movements in its environment by using its compound
eyes and its
a. | Malpighian tubules. | c. | sensory hairs. | b. | chelicerae. | d. | tracheal tubes. |
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