Term
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Definition
Lophotrochozoans, Ecdysozoa, Deuterostomes
-all have bilateral symmetry and triploblastic development |
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Term
| 3 phylums of Lophotrochozoans |
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Definition
| Platyhelminthes (flatworms), Lophophorates (brachiopods, phoronids, ectoprocts), Trochozoans (molluscs and annelids) |
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Term
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Definition
-member of platyhelminthes
-live in marine, freshwater, and damp terrestrial habitats
-flattened and have a gastrovascular cavity
-although placed with the lophotrochozoans, they lack either a lophophore or a trochophore larvae
-although they undergo triploblastic development they are acoelomates |
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Term
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Definition
| turbellaria, monogenea, trematoda, cestoda |
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Term
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Definition
| nearly all free-living and mostly marine |
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Term
| What turbellarians have light-sensitive eyespots and centralized nerve nets? |
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Definition
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Term
| spend part of their lives in snail hosts |
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Definition
| trematodes that parasitize humans |
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Term
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Definition
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Term
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Definition
| -Brachiopods, Phoronids, Ectoprocts |
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Term
| A horseshoe-shaped, suspension-feeding organ bearing ciliated tentacles |
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Definition
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Term
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Definition
| superficially resemble clams and other hinge shelled mollusks |
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Term
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Definition
| are tube-dwelling marine worms ranging from 1mm to 50cm in length |
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Term
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Definition
| colonial animals that superficially resemble plants |
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Term
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Definition
segmented worms
-have bodies composed of a series of fused rings
-Trochophore larvae |
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Term
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Definition
| Polychaetes, Oligochaetes, Leeches |
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Term
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Definition
includes snails, slugs, oysters and clams, octopuses and squids
-most mollusks are marine though some inhabit fresh water and some are terrestrial
-soft bodied animals but most are protected by a hard shell
-Trochophore larvae as part of life cycle
-body plans with three main parts: muscular foot, visceral mass, mantle |
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Term
| 3 main body characteristics of Molluscs |
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Definition
-muscular foot
-visceral mass
-a mantle |
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Term
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Definition
| Polyplacophora (chitons), Gastropoda (snails, slugs), Bivalvia (clams, mussels, scallops, oysters…ect), Cephalopoda (squids, octopuses, cuttlefish) |
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Term
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Definition
| -oval shaped marine animals encased in an armor of eight dorsal plates |
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Term
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Definition
| 3/4 of all living species of mollusks |
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Term
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Definition
| have shell divided into two halves |
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Term
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Definition
| squids, octupuses, nautiluses |
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Term
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Definition
-nematodes (roundworms), arthropods(crabs, spiders, insects,ect.)
-have chitin-based outer covering or exoskeleton. Molt by ecdysis |
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Term
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Definition
-nonsegmented pseudocoelomates covered by a touch cuticle
-among the most widespread of all animals, nematodes, or roundworms
-found in most aquatic habitats, in the soil, in moist tissues of plants, and in the body fluids and tissues of animals |
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Term
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Definition
-segmented coelomates
-have exoskeleton
-jointed appendages
-2/3 known species of animals are arthropods
-found in nearly all habitats of the biosphere
-have an open circulatory system in which a fluid called hemolymph is circulated into the spaces surrounding the tissues and organs
-variety of organs specialized for gas exchange |
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Term
| The four major lineages of arthropods that diverged early their evolution |
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Definition
1.Cheliceriforms (spiders, mites, scorpions)
2.Myriopoda (centipedes/millipedes)
3. Insects
4.Crustaceans |
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Term
| more species-rich than all other forms of life combined |
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Definition
insects
-live in almost every terrestrial habitat and in freshwater |
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Term
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Definition
| typically have branched appendages that are extensively specialized for feeding and locomotion |
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Term
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Definition
Echinoderms and chordates
-may seem to have little in common with phylum chordata, which includes vertebrates
-radial cleavage
-development of the coelom from the archenteron
-formation of the mouth at the end of the embryo opposite the blastopore |
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Term
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Definition
-have thin, bumpy or spiny skin that covers an endoskeleton of hard calcareous plates
-sea stars and most other echinoderms are slow-moving or sessile marine animals
-evovled secondarily from the bilateral symmetry of ancestors |
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Term
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Definition
-phylum chordata
-consists of two subphyla of invertebrates as well as the hagfishes and the vertebrates
-shares many features of embryonic development with echinoderms |
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Term
| All chordates share a set of |
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Definition
| derived characters although some species possess traits that exist only during embryonic development |
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Term
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Definition
-subphylum Urochordata
-belong to the deepest-branching lineage of chordates
-are marine suspension feeders commonly called sea squirts
-resemble chordates during their larval stage
-as an adult, they draw in water through an incurrent siphon filtering food particles |
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Term
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Definition
-subphylum Cephalochordata
-named for their bladelike shape |
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Term
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Definition
the least derived craniate lineage that still survives
-have cartilaginous skull and axial rod of cartilage derived form the notochord
-lack vertebrae |
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Term
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Definition
-class Cephalspidomorphi
-represents the oldest living lineage of vertebrates
-have cartilaginous segments surrounding the notochord and arching partly over the nerve cord
-they are jawless vertebrates |
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Term
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Definition
-cartilaginous fish
-have jaws
-sharks and rays |
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Term
| Vertebrates rule in ___, not in numbers of species or individuals |
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Definition
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Term
| invertebrate lineages of vertebrates are |
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Definition
size limited
-exoskeleton and circulation system of arthropods limits size |
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Term
| Evolution tried many bods resulting in how many extant phyla |
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Definition
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Term
| Once an internal skeleton and head evolve, further elaboration allowed vertebrates to |
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Definition
| proliferate and to dominate the large-bodied niches |
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