Definition: Aquatic: lack true tissues and organs: motile larvae and sessile adults; filter feeders; internal skeleton made up of spongin and/or spicules of calcium carbonate or silica .

Example: Bath Sponge

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Definition: Perviously known as coelenterates; aquatic; mostly carnivorous; two layers of true tissue; radial symmetry; tentacles bear stinging nematocysts; many alternate between polyp and medusa body forms; gastrovascular cavity.

Defintion: Spend most of their time as polyps; colonail or solitary; life cycle typically includes a medusa generation that reproduces sexually and a polyp generation that reproduces asexually.

Example: Portuguese Man-Of-War

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Definition: Spend most of their time as medusas; some species bypass polyp stage.

Example: Jellyfish

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Definiton: Colonial or solitary polyps; no medusa stage.

Example: Reef Coral

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Definition: Free-living carnivores and scavengers; live in fresh water, in salt water, or on land; move with cilia.

Example: Planarians

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Definition:

Parasites; life cycle typically invovles more than one host.

Example: Liver Fluke

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Definiton: Internal parasites; lack digestive tract; body composed of many repeating sections.

Example: Tapeworms

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Defintion: Digestive system has two openings; a mouth and a anus; psedudocoelomates.

Example: Hookworms

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Definiton: Body composed of segments seperated by internal partitions; digestive system has two openings; coelomate; closed circulatory system.

Defintion: Live in salt water; pair of bristly, flesy appendages on each segment; some live in tubes.

Example: Sandworms

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Definition: Lack appendages; few bristles; terrestrial or fresh water.

Example: Earthworm

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Defintion: Lack appendages; carnivores or blood-sucking external parasites; most live in fresh water.

Example: Medicinal leech

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Two-part hinged shell; wedge-shaped foot; typically sessile as adults; primarily aquatic; some burrow in mud or sand.

Example: Clam

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Use broad, muscular foot in movement; most have sprial, chambered shell; some lack shell;distinct head; some terrestrial, others aquatic; many are cross-fertilizing hermaphrodites.

Example: Snail

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Foot is divided into tentacles;live in salt water;closed circultory system.

Example: Octopus

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First pair of appendages specialized as feeding structures called chelicerae; body composed of two parts - cephalothorax and abdomen; lack antennae; most terrestrial.

Example: Scorpion

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Most aquatic;most live in salt water; two pairs of antennae;mouth parts called mandibles;appendages consist of two branches; many have a carapace that covers part or all of the body.

Example:Crabs

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Long body consisting of many segments; one pair of legs per segment; posion claws for feeding;conivorous.

Example:

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Long body consisting of many segments; two pairs of legs per segments; mostly herbivorus.

Example:

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Body divided into three parts head, thorax, and abdomen; three pairs of legs and usually one or two pairs of wings attached to thorax; some undergo complete metamorphosis.

Example: Fly

Star-shaped;carnivorus bottom dwellers; mouth on lower surface.

Example: Sunstar.

Small body disc; long armored arms; most have only five arms; lack an anus; most are filter feeders or detritus feeders.

Example: Basket Star

Lack arms; body encased in rigid, box like covering; covered with spines; most grazing herbivores or detrutis feeders.

Example: Sea Busict

Live in salt water; tough outer covering; display chordate features during larval stages; many adults sessile, some free swimming.

Example: Sea Squirt

Definition: most possess a vertebral column (backbone) that supports and protects dorsal nerve chord; endoskelton; distinct head with a skull and brain.

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Definition: mostly scavengers;live in salt water; short tentacles around mouth; rasping tounge; extremely slimy; open circulatory system.

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Definition: larvae filter feeders: adults are parasites whose circular mouth is lined with rasping toothlike structures; many live in bothsalty water and fresh water during the course of their lives.

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Definition: have jaws, finamend endoskelton of cartilage, most live in salt water; typically several gills slits: tough small scales with spines; ectothermic; two- chambered heart; males possess structures for internal fertilization.

Examples: Shark

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Bony endoskelton;aquatic; ectothermic; well developed respiratory system, usually invovling gills; possess sim bladder; paired fins; divided into two groups ray finned fishes, which include most living species and lobe finned fishes, whichinclude lungfishes and the coelacanth.

Example: salmon

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Adapted primarily to life in wet places; ectothermic; most carnivorous; smooth moist skin; typically lay eggs that develop in water;usually have gilled larvae; most have three chambered heart;

Example; amphibains

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Adult in almost all species lack tail; aquatic larvae called tadpoles;well developed hind legs adapted for jumping.

Example:  [image]

As a group, adapted to fully terrestrial life, some live in water;dry, scale-covered skin; ectothermic; most have three-chambered hearts; internal fertilization; amniotic eggs typically laid on land; extinct forms include dinosaurs and flying reptiles.Example:

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Lack internal ears; primitive scales; found only in New Zealand; carnivorous. One Species:

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Most carnivorous; majority terrestrial; lizards typically have legs; smacks lack legs. Example:

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Carnivorous; aquatic or semiaquatic; four chambered heart.

 Example:alligator 

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Bony shell : ribs and vertebra fused to upper part Of shell; some terrestrial, others semiaquatic or aquatic; all lay eggs on land. 

Example: snapping turtle

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Endothermic;feathered over muchon body surface; scales on legs and feet; bones hollow and lightweight in flying species; four chambered heart; well developed lungs and air sacs for effiecent air exchange. 

Example: owl

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Endothermic; subcutaneous fat;hair; most viviparous suckle young with milk produced in mammary glands four chamberheart is most have four legs; use lungs for respiration.

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Exhibit features of both mammals and reptiles; possess a cloaca; lay eggs that hatch externally; produces milk from primitive nipple like structure.

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Young develop in the females uterus but emerge at very early state of development; development completed in mothers pouch.

Example: kangaroo

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Have long narrow snouts and sharp claw for digging. 

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Flying mammals with forelimbs adapted for flight; most nocturnal; most navigate by ecolocation most species feed on insects nectar or fruits.

Examples: Bat

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HighLy developed brain and complex socialbehavior excellent binocular vision; quadrupedeal or bipedal locomotion; five digits on hands and feet

Example: monkey

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Teeth reduce or absent feed primarily on Social insects such as termites and ants.

Example: 

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Small herbivores with chisel-shaped front teet generally adapted to running and jumping. 

Example: rabbit

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Mostly herbivores but some omnivorous sharp front teeth.

Example:rat

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FulLy adapted to aquatic existence feed breed and give birth in water: forelimbs specialized as flippers external hindlimbs absent.

Example: whale

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Mostly carnivorous live in salt water or on land.

Example: 

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Herbivourous have trunks largest land animal. 

Example: elephant 

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Aquatic herbivores slow moving front limbs modified as flippers.

Example : sea cow

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Hoofed herbivoresodds number of digits on each foot teeth jaw and digestive system adapted to plant material.

Example:

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Hoofed herbivores: hoofs derived from two digits on each foot; digestive system adapted to thorougly process tough plant material.

Example: 

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