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1
At least 97% of all species of animals are invertebrates.
A)True
B)False
2
Most sponges are carnivores that suck prey in through specialized pores.
A)True
B)False
3
Feeding currents in sponges are produced by flagellated cells called choanocytes.
A)True
B)False
4
Food is trapped in most sponges by mineralized structures called spicules.
A)True
B)False
5
Support material in sponges is always made of calcium carbonate.
A)True
B)False
6
Cnidarians capture prey mainly by entangling and wrapping them with their tentacles.
A)True
B)False
7
Radial symmetry, such as seen in Cnidaria, occurs when similar parts of a body are arranged and repeated around a central axis.
A)True
B)False
8
Mature marine hydrozoan Cnidaria are mainly colonies of polyps that produce medusae.
A)True
B)False
9
The Portugese man-of-war is a type of scyphozoan cnidarian with a gas float.
A)True
B)False
10
Scyphozoan cnidarians may be found in a polyp form, but the medusa stage generally dominates.
A)True
B)False
11
In anthozoan cnidarians, the polyp form has complex internal septa to aid digestion.
A)True
B)False
12
Corals and gorgonians are types of anthozoan cnidarians.
A)True
B)False
13
Ctenophores (comb jellies) are similar to scyphozoan cnidarians in that they have tentacles with nematocysts.
A)True
B)False
14
In bilaterally symmetric animals, the term "bilateral" indicates that there are two ways of cutting the body to get two identical halves.
A)True
B)False
15
Platyhelminths have a centralized brain, while cnidarians do not.
A)True
B)False
16
Platyhelminths have a complete digestive tract with mouth and anus, while cnidarians do not.
A)True
B)False
17
Parasitic platyhelminths known as flukes typically infect a vertebrate as an adult, though may infect an invertebrate as a larva.
A)True
B)False
18
Nemertean worms entangle prey with a proboscis everted from a cavity above the mouth.
A)True
B)False
19
Marine nematode worms are hardly ever seen because they are relatively few in number.
A)True
B)False
20
Annelid worms have a true coelom for a body cavity, but nematode, nemertean, and platyhelminth worms do not.
A)True
B)False
21
Segments of polychaete worms usually have fleshy extensions called parapodia which often have stiff bristles called setae.
A)True
B)False
22
Polychaete worms, like earthworms on land, are all deposit feeders.
A)True
B)False
23
All known animal phyla were discovered by biologists by the early 20th century.
A)True
B)False
24
Pogonophoran worms differ from most other worms in that their digestive tracts are filled with bacteria.
A)True
B)False
25
Most molluscs have a radula, a ribbon-like structure that carries rows of small teeth.
A)True
B)False
26
All molluscs have an external shell made of calcium carbonate.
A)True
B)False
27
Some gastropods use their radulas to scrape algae from rocks, and some are carnivores that may use the radula to rasp a hole in a prey's shell.
A)True
B)False
28
Brachiopods or lamp shells are a type of mollusc with a two-part shell.
A)True
B)False
29
Most bivalves use their radular teeth like a filter to trap small particles in the water.
A)True
B)False
30
Cephalopods use a structure called a funnel to squirt out water from their mantle cavities in order to create a kind of jet propulsion.
A)True
B)False
31
Squids and cuttlefish have internal shells.
A)True
B)False
32
Most chitons (Polyplacophora) use their radulas to scrape algae off shoreline rocks.
A)True
B)False
33
Molluscs and annelids produce similar planktonic larvae called trochophores.
A)True
B)False
34
Cephalopods are considered to have the most complex brain outside of the vertebrates, capable of advanced learning.
A)True
B)False
35
Arthropods must discard (molt) their chitinous exoskeletons in order to grow.
A)True
B)False
36
Some amphipods can jump.
A)True
B)False
37
Copepod crustaceans typically use their antennae to swim in the plankton.
A)True
B)False
38
Barnacles use their antennae to filter particles out of the water.
A)True
B)False
39
Decapods generally have 5 pairs of swimming legs on the cephalothorax.
A)True
B)False
40
Hermit crabs have a long, soft abdomen, while true crabs have a small abdomen tucked under the cephalothorax.
A)True
B)False
41
Most asteroidean echinoderms are carnivores, while most ophiuroideans eat particulate matter and small organisms off the bottom.
A)True
B)False
42
Sea urchins (echinoidean Echinodermata) feed with an elaborate jaw and muscle device called Aristotle's lantern.
A)True
B)False
43
Sea cucumbers (holothuroidean Echinodermata) are carnivores, using modified tentacular tube feet to grasp animal prey.
A)True
B)False
44
Echinoderms have a separate brain for each portion of the radial body.
A)True
B)False
45
Echinoderms, hemichordates and chordates (which include humans) are all thought to be closely related because of common features in early embryonic development.
A)True
B)False
46
Sea squirts lose their notochord as adults.
A)True
B)False
47
Benthic sea squirts (ascidiacean Urochordata) and planktonic salps (thaliacean Urochordata) both filter-feed with an incurrent and excurrent siphon.
A)True
B)False
48
Lancets (Cephalochordata) are similar to vertebrates in structure except for the lack of a backbone.
A)True
B)False
49
The following animals are largely carnivores:
A)Chaetognatha
B)Bryozoa
C)Brachiopoda
D)Sipunculida
50
Echinoderms are characterized by
A)usually having a heptaradial symmetry.
B)having an exoskeleton similar to that of the Arthropoda.
C)often moving by use of hundreds of fluid-powered tube feet.
D)all of the above.
E)both b and c.
51
Some of the most common and widespread marine animals are
A)insects.
B)copepods.
C)loriciferans.
D)brachiopods.





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