Life Science

Chapter 13: Mollusks, Worms, Arthropods, Echinoderms

Mollusks, Worms, Arthropods, and Echinoderms

1.
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?
A)mimicry
B)poisonous sting
C)foul odor
D)camouflage
2.
Swimmerets help some crustaceans, like crabs, take in dissolved oxygen by forcing the water over __________.
A)feathery gills
B)moist skin
C)book lungs
D)spiracles
3.
What do millipedes feed on?
A)soil
B)plants and decaying material
C)blood
D)snails and slugs
4.
How are arthropods like annelids?
A)Both have jointed appendages.
B)Both have segmented bodies.
C)Both have setae.
D)Both have an exoskeleton.
5.
What special feature does a cephalopd use to move quickly?
A)a muscular foot
B)creeping on tentacles
C)a jet of water
D)rapid movement of its shell
6.
One reason segmented worms are important to humans is because some of them __________.
A)destroy mollusks
B)condition and aerate the soil
C)pollinate crops
D)drill holes in submerged wood
7.
What are the stages of development in complete metamorphosis?
A)egg, worm, adult
B)egg, nymph, and adult
C)egg, birth, larva, insect
D)egg, larvae, pupa, and adult
8.
What does the word annelid mean?
A)head-footed
B)spiny skin
C)little rings
D)jointed foot
9.
Which one of the following is an example of an arachnid?
A)crab
B)scorpion
C)grasshopper
D)bee
10.
Scientists hypothesize that __________ are the invertebrate group that most closely resembles animals with backbones.
A)echinoderms
B)segmented worms
C)arthropods
D)mollusks
11.
Which one of these animal groups is radially symmetrical?
A)segmented worms
B)echinoderms
C)arthropods
D)mollusks
12.
Earthworms are hermaphrodites. This means that they produce ___________.
A)neither sperm nor eggs
B)sperm and eggs in the same body
C)only eggs
D)only sperm
13.
A(n) __________ is an example of an organism from the most specialized and complex mollusk group.
A)slug
B)clam
C)squid
D)oyster
14.
Which one of the following is a thin layer of tissue in mollusks that often secretes a shell?
A)mantle
B)gizzard
C)radula
D)exoskeleton
15.
At the ocean, you find an organism that is covered with stiff, hairlike spines. Which one of the following is it likely to be?
A)sea urchin
B)brittle star
C)sea cucumber
D)sand dollar
16.
Because bivalves are __________, bacteria and other harmful organisms often become trapped in clams and oysters.
A)head-footed
B)soft bodied
C)parasites
D)filter feeders
17.
An arthropod's old exoskeleton is shed and replaced by a new one in a process called __________.
A)mimicry
B)metamorphosis
C)digestion
D)molting
18.
What annelid worm has a sucker at each end of its body?
A)an earthworm
B)a leech
C)a bristleworm
D)a polychaete
19.
Crabs and water fleas are examples of __________.
A)arachnids
B)centipedes
C)crustaceans
D)insects
20.
Which group of mollusks often has eyes on the tips of tentacles and uses a radula to obtain food?
A)cephalopods
B)gastropods
C)bivalves
D)arachnids
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