WorksheetsAnimals Pt. 1
Total questions: 18
Worksheet time: 9mins
Name
Class
Date
1.
These primitive animals lack body symmetry, tissues, and true organs, but have flagellated collar cells to filter water.
a)
sponges
b)
choanoflagellates
c)
protists.
d)
cnidarians
e)
placozoans
2.
Cnidarians typically have different body forms at different stages in their life cycle. One form is tubular and usually attached to a surface, while the other form is bell-shaped and free-swimming. What is the name of the bell-shaped, free swimming form?
a)
medusa
b)
lancelet
c)
tunicate
d)
polyp
e)
marine worm
3.
Jellyfish and sea anemones are examples of animals with
a)
a complete digestive system
b)
radial symmetry
c)
no body symmetry
d)
multiple hearts
e)
no known relatives
4.
Marine worms, earthworms and leeches are all examples of
a)
arthropods
b)
annelids
c)
nematodes
d)
rotifers
e)
chelicerates
5.
Tapeworms are a highly modified form of parasitic flatworm in which the body consists of a head region and a series of repeating reproductive units. What is the technical term for the tapeworm “head”?
a)
parapodia
b)
proglottid
c)
adhesive
d)
scolex
e)
sucker
6.
The shell in mollusks is produced by a structure called the
a)
radula
b)
chaetae
c)
stoma
d)
mantle
e)
shellac
7.
The tentacles of cephalopods like octopuses and squids evolved from
a)
the fleshy foot
b)
the muscular tail
c)
the mesoderm
d)
primitive fingers
e)
the external shell
8.
Which of the following is defined as the ability to suspend life processes completely during unfavorable conditions, thus allowing individuals to survive extreme drying, heat, or cold.
a)
cryptobiosis
b)
amniosynthesis
c)
uterobiosis
d)
cryogenesis
e)
parthenogenesis
9.
Water bears are tiny bilateral animals that have a true coelom, the ability to molt, and are relatives of roundworms and insects. The more technical name of these animals is
a)
rotifers
b)
walruses
c)
beetles
d)
tardigrades
e)
millipedes
10.
Cnidarians have special stinging organelles that they use for feeding and defense. These organelles are called
a)
medusas
b)
nematocysts
c)
radulas
d)
nerve nets
e)
cnidarian cnunchucks
11.
Oysters, scallops, mussels, and clams are examples of mollusks called
a)
chitons
b)
gastropods
c)
bivalves
d)
cephalopods
e)
snapping mollusks
12.
Phylum Nematoda includes unsegmented, pseudocoelomate worms with a secreted cuticle that is molted; most are decomposers, but a few are parasitic. The common name for these animals is
a)
marine worms
b)
roundworms
c)
ringworms
d)
rotifers
e)
tardigrades
13.
The oldest living arthropod lineage is represented by marine chelicerates known as
a)
horseshoe crabs
b)
dragonflies
c)
trilobites
d)
lobsters
e)
star fish
14.
Arthropods are characterized by
a)
a hardened exoskeleton
b)
jointed appendages
c)
highly modified segments (example: wings)
d)
sensory specialization (example: compound eyes)
e)
all of the above
15.
Free-living flatworms (planarians) are characterized by
a)
an incomplete digestive system with a single opening
b)
a simple nervous system with nerve cords and ganglia
c)
a flat body plan which relies on diffusion for nutrient exchange
d)
all of the above
e)
none of the above
16.
Lobsters, crayfish, crabs and shrimps are examples of
a)
echinoderms
b)
marine insects
c)
tardigrades
d)
myriapods
e)
crustaceans
17.
Unlike centipedes, millipedes have
a)
one pair of legs per segment
b)
two pairs of legs per segment
c)
wings
d)
fangs
e)
antennae
18.
Insects have a three-part body plan, with most of the internal organs found in the segment called the
a)
head
b)
thorax
c)
pouch
d)
guts
e)
abdomen
100 %
