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50 Cards in this Set
- Front
- Back
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At least 97% of all species of animals are invertebrates.
A. True B. False |
A. True
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Sponges do not have which feature?
A. Specialized cells B. Gametes C. Supporting structures D. Organs |
D. Organs
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Feeding currents in sponges are produced by flagellated cells called choanocytes.
A. True B. False |
A. True
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Water enters a sponge through which part?
A. Osculum B. Ostium C. Coelom D. Pinacocytes |
B. Ostium
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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 |
A. True
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In all animals with radial symmetry,
A. There is no head B. The body plan is in five parts C. There is no oral surface D. There is an anterior end |
A. There is no head
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Mature marine hydrozoan Cnidaria are mainly colonies of polyps that produce medusae.
A. True B. False |
A. True
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The gelatinous bell of a medusa is composed of which of these? A. Cnidocytes B. Mesoglea C. Spicules D. Gastrodermis |
B. Mesoglea |
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Scyphozoan A. True B. False |
A. True |
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There is no medusa stage in the
A. Anthozoa B. Hydrozoa C. Scyphozoa D. Cubozoa |
A. Anthozoa
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Ctenophores are similar to scyphozoan cnidarians in that they both have which feature?
A. Gelatinous body B. Sting their prey C. Rows of long cilia D. Skeleton of calcium carbonate |
A. Gelatinous body
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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 |
B. False
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Marine worms may gain support for the body from which of these means?
A. An exoskeleton B. A protein skeleton C. A hydrostatic skeleton D. An endoskeleton |
C. A hydrostatic skeleton
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Platyhelminths have a centralized brain, while cnidarians do not.
A. True B. False |
A. True
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Unlike other flatworms, tapeworms have which feature?
A. A long proboscis B. No digestive tract B. Bright colors D. A gut with septa |
B. No digestive tract
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Nemertean worms entangle prey with a proboscis everted from a cavity above the mouth.
A. True B. False |
A. True
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Marine nematode worms are hardly ever seen because they are relatively few in number.
A. True B. False |
B. False
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Annelid worms have a true coelom for a body cavity, but nematode, nemertean, and platyhelminth worms do not.
A. True B. False |
A. True
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A polychaete worm can be told from a sipunculan, nemertean, or echiuran by its
A. Suckers B. Movable anterior portion C. Non-retractable proboscis D. Segmentation |
D. Segmentation
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Segments of polychaete worms usually have fleshy extensions called parapodia often have stiff bristles called setae.
A. True B. False |
A. True
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Pogonophoran worms differ from most other worms in that their digestive tracts are filled with bacteria.
A. True B. False |
B. False
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Molluscs and annelids produce similar planktonic larvae called trochophores.
A. True B. False |
A. True
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Most molluscs have a radula, a ribbon-like structure that carries rows of small teeth.
A. True B. False |
A. True
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Among mollusks, there is no radula among the
A. Gastropods B. Bivalves C. Cephalopods D. Chitons |
B. Bivalves
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All molluscs have an external shell made of calcium.
A. True B. False |
B. False
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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 |
A. True
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In a bivalve, the gills serve in
A. Gas exchange only B. Gas exchange and feeding C. Gas exchange and shell production D. Gas exchange and production of noxious chemicals |
B. Gas exchange and feeding
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Which feature of cephalopods is found in other mollusks?
A. Food modified into arms and suckers B. Complex nervous system C. Closed circulatory system D. Mantle |
D. Mantle
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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 |
A. True
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Cephalopods are considered to have the most complex brain outside of the vertebrates, capable of advanced learning.
A. True B. False |
A. True
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A closed circulatory system always has which of these features?
A. Blood within distinct vessels B. A heart with chambers C. Open blood spaces D. The ability to take up nutrients from seawater |
A. Blood within distinct vessels
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A carapace
A. Covers the cephalothorax B. Is segmented C. Has two lateral valves D. Is present in all Crustacea |
A. Covers the cephalothorax
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Arthropods must discard (molt) their chitinous exoskeletons in order to grow.
A. True B. False |
A. True
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Crustaceans generally reproduce by
A. External fertalization B. Use a modified arm to transfer a packet of sperm C. Direct sperm transfer D. Releasing gametes into the water |
C. Direct sperm transfer
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Copepod crustaceans typically use their antennae to swim in the plankton.
A. True B. False |
A. True
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Some of the most common and widesperad marine animals are
A. Insects B. Copepods C. Loriciferans D. Brachiopods |
B. Copepods
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Barnacles use their legs to filter particles out of the water.
A. True B. False |
A. True
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An important food source in polar ecosystems consists of
A. Hermit crabs B. Barnacles C. Krill D. Fish lice |
C. Krill
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Decapods have
A. Only one pair of antennae B. Specialized feathery filtering appendages C. A large proboscis D. Three pair of maxillipeds |
D. Three pair of maxillipeds
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Hermit crabs have a long, soft abdomen, while true crabs have a small abdomen tucked under the cephalothorax.
A. True B. False |
A. True
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Colonial zooids with a lophophore belongs to the
A. Phoronida B. Anthozoa C. Byozoa D. Brachiopoda |
C. Bryozoa
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Echinoderms are charcterized 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 |
C. Often moving by use of hundreds of fluid-powered tube feet
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In a starfish, an external part of the water-vascular system is
A. The ring canal B. Aristotle's lantern C. An ampulla D. A tube foot |
D. A tube foot
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Echinoderms, hemichordates, and chordates (which include humans) are all thought to be closely related because of common features in early embryotic development.
A. True B. False |
A. True
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Hemichordates and echinoderms may have
A. A notochord B. A dorsal nerve cord C. Similar larval stages D. A backbone |
C. Similar larval stages
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Sea cucumbers (holothuroidean Echinodermata) are carnivores, using modified tentacular tube feet to grasp animal prey.
A. True B. False |
B. False
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The mouth is directed upward in the
A. Asteroidea B. Crinoidea C. Holothuroidea D. Ophiuroidea |
B. Crinoidea
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Sea squirts lose their notocord as adults.
A. True B. False |
A. True
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A lancelet, like other chordates, has which feature?
A. A pair of large eyes B. A water-vascular system C. A large proboscis D. A dorsal nerve |
D. A dorsal nerve cord
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The Cephalochordata feed by
A. Collecting particles among ciliated arms B. Deposit feeding C. Using the proboscis to stir up prey D. Filter-feeding |
D. Filter-feeding
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