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| The _____ of freshwater clam species is a modified veliger larva. The larva attaches to a fish gill and after several weeks of larval development, the minature clam falls from its host and takes up its filter-feeding lifestyle. |
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| The touch, leathery polysaccharide in the insect procuticle is _____ |
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| Which feature is not characteristic of annelids? |
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| The intromittent organ of male cephalopods (i put this word in there!!Mollusks) is the |
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Definition
| hectocotylus, a modified arm |
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| Reproduction in the earthworm involves |
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Definition
| cross-fertilization between two hermaphroditic organisms |
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| Plychaetes differ from other annelids because polychaetes |
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Definition
| have paired parapodia on most segments |
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ALL OF THE CHOICES ARE CORRECT
-involves production of a new cuticle and shedding of the old one
-is initiated by a stimulus pereived by the cntral nervous system
-involves a molt-inhibiting hormone produced by the X organ o the eye stalk, and a molting horone produced by the Y organs near the mandibes
-cues on stimuli such as day length, temperature, or humidity |
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Term
| Structures that function in chemoreception and are found at the anterior and posterior ends of nematodes are the |
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Definition
| an extension of the cuticle (exoskeleton) |
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| Crustacea are "biramous" meaning they possess |
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Definition
| jointed appendages having two branches |
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| A bull's eye rash is characteristic of |
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Definition
ALL OF THE CHOICES
-has a clitellum only during the breeding season
-has a fixed number of segments
-has both anterior and posterior suckers |
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Term
| The body plan of members of the class Malacostraca shows a standard pattern of appendage arrangement along the entire body that suggests |
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Definition
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| Filarial worms that cause elephantiasis are acquired |
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Definition
| when mosquitoes inject larval worms ito the bloodstream |
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| The three tagmata of an insect are |
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Definition
| head, thorax, and abdomen |
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| The genus _____ contains some members that have a toxin strong enough to kill humans |
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Definition
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| Members of the class Arachnida have |
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Definition
| a cephalothorax and abdomen |
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Term
| Scabies mites (Sarcopetes scabei) |
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Definition
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| If the main disease symptom is anemia (low red blood cell count), the most likely nematode parasite is |
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Definition
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| How do you become infected with Necator americanus hookworms? |
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Definition
| Larvae burrow into your feet |
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| The mild nematode infection somewhat common among children in the southern U.S., and transmitted as eggs fro manal to oral regions by the hands is |
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Definition
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| Which of these is NOT a nematode? |
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Definition
| Schistosoma mansoni, agent of schistosomiasis |
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| The oldest ancestral and most widely-occurring larva in the Crustacea is |
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Definition
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| The cephalopod nervous system is best described as |
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Definition
| the most advanced among molluscs |
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| Trilobites exist today as |
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Definition
| fossils only; they are all extinct |
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Definition
| food is partly digested externally and the nutritive juices are sucked into the stomach |
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| Arthropods are successful because they have |
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Definition
ALL
-jointed appendages modified for various functions
-reduced intraspecific competition through metamorphosis
-a protective exoskeleton that allows both protection and mobility |
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Definition
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Definition
| bear two pairs of legs on most body segments |
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| the cocoon in the earthworm is produced by the |
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Definition
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| A robin has difficulty pulling an earthworm from its earthen burrow because of small chitinous bristles called |
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Definition
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| Marine crustaceans that are sessile, secrete calcareous plates and filter-feed are |
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Definition
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| Which of the following is NOT an advantage of segmentation in the Phylum Annelida? |
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Definition
| Metamerism eliminates the need to find a mate |
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Definition
ALL
-has more species than any other group of animals
-is of major medical importance to humans
-is of major economic importance to humans
-plays a critical role in ecological systems all over the world |
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Definition
ALL OF THE CHOICES
-not only rasps off fine food particles but also serves as a conveyor belt to carry food toward the digestive tract
-replaces worn teeth by secreting new teet hat the posterior end
-varies in number, pattern, and form of teeth, allowing species to be classified by this trait
-may be modified in some predators allowing for the release of radular teeth to inject toxins into prey? |
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Definition
ALL CHOICES CORRECT
-is used to form webs for capturing prey
-is a protien and its chemical composition differs somewhat between species
-is stored as a gel in a sotrage chamber
-is used to wrap eggs into a case for development |
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Term
| Of all the freshwater organisms, more freshwater clams are becoming endangered than other species. what is the likely reason? |
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Definition
| As filter-feeders, the y concentrate pollutants and are more likely to be harmed by water pollution |
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Definition
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| What is the function of the green glands in the crayfish |
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Definition
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| adult chelicerate arthropods possess |
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Definition
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| Which arachnid has a bite or sting that is neurotoxic and can cause paralysis? |
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Definition
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| Butterflies exhibit complete or ___ metamorphis |
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Definition
ALL OF THE ABOVE
-is unique to gastropods
-is a 180' counterclockwise twisting of the visceral mass, mantel and mantle cavity
-shifts the anus from posterior to anterior |
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Term
| If you are discovered to have an infection of Ascaris lumbricoides, large intestinal roundworms, your most likely danger is |
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Definition
| blockage of the intestines |
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Term
| The remaining valid use of 'medicinal leeches' is to |
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Definition
| apply them tissues of surgically reattached appendages to relieve blood congestion and allow damaged vessels to grow back |
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Term
| Gas exchange in the earthworm occurs throug hthe |
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Definition
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| The nematode Caenorhabditis elegans has allowed scientists to develop 'fate maps' tracing cell lines back to cell origins. the trait of nematodes and some other related groups where they have a set number of cell divisions leading to the same number of body cells in an adult is called |
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Definition
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| The circulatory system of most mollusks is |
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Definition
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| The major body space in arthropods is the |
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Definition
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Definition
| live in the ocean, especially in intertidal areas |
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