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28 terms

BIO182 Exam 3, Ch 33

This set is a work in progress. Questions will be added as we progress through the class.
STUDY
PLAY
Sponge "eating"...
water is drawn in through pores into a cavity called the spongocoel, and out through opening called osculum
Body plan of a cnidarian
sac w/ central digestive compartment = gastrovascular cavity, which serves as a hydrostatic skeleton
Turbellaria
(mostly free-living flatworms), generally non-parasitic
Rotifers reproduce...
by parthenogenesis; females produce offspring by unfertilized eggs
Members of class polychaetes have..
paddle-like parapodia that work as gills and aid in locomotion
Millipedes have...
Many legs. Each trunk segment has two pairs of legs.
Echinoderms have a unique..
water vascular system, a network of hydraulic canals branching into tube feet that function in locomotion, feeding, and gas exchange.
A radially symmetrical animal that has two embryonic tissue layers probably belongs to which phylum?
Cnidera
Which cells in a sponge are primarily responsible for trapping and removing food particles from circulating water?
Choanocytes
Corals are most closely related to which group?
sea anemones
What would be the most effective method of reducing the incidence of blood flukes in a human population?
Reduce the freshwater snail population
A lophophore is used by ectoprocts and brachiopods for...
feeding
A terrestrial mollusc without a shell belongs to which class?
gastropods
Which molluscan class includes marine organisms whose shell consists of eight plates?
chitons
Many of these annelids are parasites
Hirudinea (leeches)
Of the annelid classes below, which make castings that are agriculturally important
Oligochaeta
Some species of this annelid class release an anticoagulant that is of medical significance?
Hirudinea (leeches)
A characteristic of nematodes
Only have longitudinal muscles
Humans most frequently acquire trichinosis by
eating undercooked pork
Infection with which parasite might cause excessive elasticity in human skeletal muscles
trichinella worms
Which of the following are entirely, or partly, composed of calcium carbonate?
coral animals' exoskeletons
Among the invertebrate phyla, phylum Arthropoda is unique in possessing members that have
wings
Which of the following characteristics most likely explains why insects are so successful at dispersing to distant environments?
wings
The possession of two pairs of antennae is a characteristic of
crustaceans
Protostomes that have an open circulatory system and an exoskeleton of chitin are part of which phylum?
Arthropoda
Protostomes with a unique drape of tissue that may secrete a shell are part of which phylum?
Mollusca
Deuterostomes that have an endoskeleton are part of which phylum?
Echinodermata
Protostomes that have a closed circulatory system and obvious segmentation are part of which phylum
Annelida