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| 1 | |
Scientists hypothesize that __________ are the invertebrate group that most closely resembles animals with backbones.
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| | A) | echinoderms |
| | B) | segmented worms |
| | C) | mollusks |
| | D) | arthropods |
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| 2 | |
Why would agriculture be impossible without arthropods?
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| | A) | Insect pests feed on cultivated crops. |
| | B) | They help return nitrogen to the soil. |
| | C) | They aerate the soil. |
| | D) | Insects pollinate crops. |
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| 3 | |
What annelid worm has a sucker at each end of its body?
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| | A) | a polychaete |
| | B) | a leech |
| | C) | an earthworm |
| | D) | a bristleworm |
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| 4 | |
A(n) __________ is an example of an organism from the most specialized and complex mollusk group.
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| | A) | squid |
| | B) | slug |
| | C) | oyster |
| | D) | clam |
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| 5 | |
What are the stages of development in complete metamorphosis?
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| | A) | egg, worm, adult |
| | B) | egg, birth, larva, insect |
| | C) | egg, nymph, and adult |
| | D) | egg, larvae, pupa, and adult |
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| 6 | |
One reason segmented worms are important to humans is because some of them __________.
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| | A) | drill holes in submerged wood |
| | B) | condition and aerate the soil |
| | C) | pollinate crops |
| | D) | destroy mollusks |
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| 7 | |
What does the word annelid mean?
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| | A) | head-footed |
| | B) | little rings |
| | C) | spiny skin |
| | D) | jointed foot |
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| 8 | |
Which one of the following is a thin layer of tissue in mollusks that often secretes a shell?
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| | A) | gizzard |
| | B) | mantle |
| | C) | radula |
| | D) | exoskeleton |
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| 9 | |
While on a picnic, you avoid an insect with yellow and black stripes. Later, you discover the insect was a harmless fly. What self-defense does this fly use?
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| | A) | foul odor |
| | B) | poisonous sting |
| | C) | mimicry |
| | D) | camouflage |
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| 10 | |
Crabs and water fleas are examples of __________.
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| | A) | arachnids |
| | B) | crustaceans |
| | C) | centipedes |
| | D) | insects |
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| 11 | |
Swimmerets help some crustaceans, like crabs, take in dissolved oxygen by forcing the water over __________.
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| | A) | book lungs |
| | B) | feathery gills |
| | C) | spiracles |
| | D) | moist skin |
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| 12 | |
Which one of the following special structures does an earthworm use to grind up soil it ingests?
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| | A) | intestine |
| | B) | gizzard |
| | C) | setae |
| | D) | crop |
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| 13 | |
Which group of mollusks often has eyes on the tips of tentacles and uses a radula to obtain food?
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| | A) | gastropods |
| | B) | arachnids |
| | C) | bivalves |
| | D) | cephalopods |
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| 14 | |
How are arthropods like annelids?
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| | A) | Both have setae. |
| | B) | Both have segmented bodies. |
| | C) | Both have an exoskeleton. |
| | D) | Both have jointed appendages. |
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| 15 | |
Which one of the following is a characteristic of insects that can be used to distinguish them from other arthropods?
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| | A) | They have long bodies with many segments. |
| | B) | They have an exoskeleton. |
| | C) | They have eight legs. |
| | D) | They can fly. |
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| 16 | |
What special feature does a cephalopod use to move quickly?
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| | A) | creeping on tentacles |
| | B) | a jet of water |
| | C) | a muscular foot |
| | D) | rapid movement of its shell |
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| 17 | |
At the ocean, you find an organism that is covered with stiff, hairlike spines. Which one of the following is it likely to be?
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| | A) | sea cucumber |
| | B) | brittle star |
| | C) | sand dollar |
| | D) | sea urchin |
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| 18 | |
Which of the following groups would you expect to have the best-preserved fossils?
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| | A) | slugs |
| | B) | leeches |
| | C) | earthworms |
| | D) | insects |
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| 19 | |
Which one of the following is an example of an arachnid?
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| | A) | bee |
| | B) | grasshopper |
| | C) | crab |
| | D) | scorpion |
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| 20 | |
Sea stars move by using their __________.
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| | A) | muscular foot |
| | B) | tube feet |
| | C) | jointed appendages |
| | D) | tentacles |
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