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33 Cards in this Set

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List the characteristics of the phylum Cnidaria that distinquish it from the other animal phyla.
Diploblastic; radially symmetrical; gastrovascular cavity
Describe the specialized cells that are found in Cnidarians.l
Cnidocyte cells that function in defense and prey capture.
Describe the two basic body plans in Cnidaria and their role in Cnidarian life cycles
Polyp stage is asexual and medusa is sexual, these stages are alternate, one producing the other.
List four classes of Cnidarian and distingusih among them based on life cycle and morphological characteristics
Hydrozoa-Both poly and medusa stage.
Scyphozoa- Polyp stage absent
Cubozoa- medusa
Anthozoa- medusa stage completly absent
List the characteristics of the Phylum platyhelminthes that distinguish it from the other animal phlya
Dorsoventrally flattened
unsegmented acoelomates
gastrovascular cavity or no digestive tract
Platyhelminthes
Turbellaria
(flatworms) Most marine; some freshwater; a few terrestrial; predators and scavengers; body surface ciliated.
Platyhelminthes
Trematoda
(flukes) parasites, mostly of vertabrates; two suckers attached to host; most life cyles include intermediate and final hosts.
Platyhelminthes
Cestoda
(tapeworms) Parasites of vertabrates; scolex attaches to host; proglottids produce eggs and break off after fertilization; no head or digestive system; life cycles with one or more intermediate hosts.
List the characteristics that distinguish the phylum Mollusca from the other animal phyla.
Coelomates with three main body parts( mascular foot, visceral mass, mantle); coelom reuced; most have hard shell made of calcium carbonate
Mollusca
Polyplacophora
(chitions) Marine; with eight plates; foot used for locomotion; radula; no head
Mollusca
Gastropoda
(snails, slugs) Marine, freshwater, or terrestrial; head present; a symmetrical body, usually coiled shell; shell reduced or absent; foot for locomotion; radula
Mollusca
Bivalvia
(clams, mussels, scallops, oysters) Marine and freshwater; flattened shell with two valves; head reduced; paired gills; no radula; most are suspension feeders; mantle forms siphons
Mollusca
Cephalopoda
(squids, octopuses) Marine; head surrounded by grasping tentacles, usually with suckers; shell external, internal, or absent; mouth with or without radula; locomotion by jet propulsion using siphon formed from foot
List the characteristics that distinguish the phylum annelida from other animal phyla
Coelomates with segmented body wall and internal organs(exept digestive tract, which is unsegmented)
Annelida
Oligochaeta
(freshwater, marine, and terrestrial segmented worms) Head reduced;no parapodia, but chaetae present
Annelida
Polychaeta
(mostly marine segmented worms) Have a well-developed head; each segment usually has parapodia with many chaetae; free living
Annelida
Hirudinea
(leeches) Body usually flattened, with reduced coelom and segmentation; chaetae usually absent; suckers at anterior and posterior ends; parasites, predators, and scavengers
List the characteristics of of the phylum Nematoda that distinguish them from the other wormlike animals.
Cylindrical, unsegmented pseudocoelomates with tapered ends; no circulatory system; undergo ecdysis
List the characteristics of anthropods that distinguish them from the other animal phyla
Coelomates with segmented body, jointed appendages, and exoskeleton made of protein and chitin
List three feature that account for the success of anthropoda
Segmented bodies
hard exoskeleton
jointed appendages
Describe advantages and disadvantages of an exoskeleton.
The rigid exoskeleton protects the animal and provides points of attachment for the muscles that move the appendages
When organism grows out of shell and undergoes molting process making it vulnerable to predation while its soft ecoskeleton hardens
Arthropod
Cheliceriformes
(horseshoe crabs, spiders, scorpions) Body having one or two main parts; six pairs of appendages (chelicerae, pedipalps, and four pairs of walking legs); mostly terrestrial or marine
Arthropod
Myriapoda
(millipedes and centipedes) distinct head bearing antennae and chewing mouthparts
Arthropod
Hexapoda
(insects, springtails) Body divided into head, thorax, and abdomen; antennae present; mouthparts modified for chewing, sucking, lapping; three pairs of legs and usually two pairs of wings; mostly terrestrial
Arthropod
Crusctacea
(crabs, lobsters, crayfish. shrimp) Body of two or three parts; antennae present; chewing mouthparts; three or more pairs of legs; mostly marine and freshwater.
Describe three specialized features of spiders
1) Use fanglike chelicerae, which are equipped with posion glands, to attack prey
2) book lungs enhance echange of O2 and CO2
3) Web produced from liquid protein
Describe two features that may account for the great diversity of insects.
1) Flight
2) evolutionary expansion of flowering plants
List the characteristics of echinoderms that distinguish them from other animal phyla
Coelomates with bilaterally symmetrical larvae and five-part body orginization as adults; unique water vascular system, endoskeleton
Enchinoderm
Asteroidea
Sea star
Enchinoderm
Ophiuroidea
Brittle stars
Enchinoderm
Echinoidea
sea urchins, sand dollars
Enchinoderm
Crinoidea
Sea lilies, feather stars
Enchinoderm
Holothuroidea
Sea cucumbers