Deep sea fish that is bioluminescent; males are parasites attached to the females; have huge, gaping mouths

Fins that keep fish from rolling from side to side; can have spines and act as a weapon

Fin that gives fish its forward motion; tail fin

Exit for digestive, excretory, and reproductive systems

Young develop in eggs inside the female's body

Young develop in eggs in the environment

Line of sense organs running the length of a fish's body; sense nearby vibrations and movement

Pores on the rostrum and around the mouth of sharks and other cartilaginous fishes; electroreceptors

Fish body shape that is flat and upright; eyes on opposite sides of the head; includes angelfish

Fish body shape that is flat and horizontal; eyes on the same side of the body; includes stingrays, flounder

Slender, eel-like body; no paired appendages; no vertebral column; tongue with two rows of teeth

Slender, eel-like body; no paired appendages; circular mouth with lots of teeth; may are parasitic

Shark that is large and potentially dangerous to humans; cannibalistic before birth

Egg case of sharks and skates

Small deep sea shark that is responsible for large, circular wounds on its prey

Which of the following best describes adult amphibians like frogs and salamanders?

Paedomorphic salamander that typically retains external gills into adulthood, but can (very rarely) metamorphose into a terrestrial, lung-breathing form

Paedomorphic salamander that retains external gills into adulthood and never goes through metamorphosis

What is the largest frog in the world?

What is the largest frog in the United States?

Which of the following is associated with cutaneous respiration?

Mouth parts of crickets, grasshoppers, and carnivorous insects

Structures associated with some arthropods; used in flight; can be membrane-like, scaled, papery, or thick and rigid

Arthropods with well-defined head, thorax, and abdomen; two pairs of antennae, 1 pair of mandibles; most are aquatic; "aquatic mandibulates"

Arthropods with one pair of antennae; mandibles; most are terrestrial; "terrestrial mandibulates"

Arthropods with no antennae; no mandibles; most are terrestrial; specialized mouthparts called chelicerae

What element is responsible for the blue coloration of arthropod blood?

Glands that secrete toxic or repellant fluids; used as defense to ward off predators

Appendages that manipulate spider silk

Produce spider silk

Crustaceans with 5 pairs of walking legs; chelipeds; 2 pairs of antennae; includes shrimp; crabs; lobsters

Crustaceans with legs that are very similar; 2 pairs of antennae; terrestrial crustaceans

Arthropods with two tagmata (cephalothorax and abdomen); chelicerae and pedipalps for eating; no antennae, no mandibles

Complete change from larval stage to adult stage; includes drastic changes in dietary needs and appearance; applies to most insects

Insect metamorphosis that is a gradual change from nymph to adult stage; these insects lack a pupal stage; incomplete metamorphosis

Development in which the young are similar to adults in appearances and dietary needs

Leg-like appendages of chelicerates that are used for feeding; can form pincers or fangs

Arthropods with well-defined head, thorax, and abdomen; one pair of antennae, 1 pair of mandibles; 3 pairs of legs; some have wings

Five pairs of arches that maintain steady blood pressure in an annelid's body; "hearts" that pump blood

Reproductive segment of an annelid; creates a cocoon to house fertilized eggs

Annelids that have the ability to seek out warm-blooded prey; either fluid-feeders/blood suckers or eat small invertebrates

Make and secrete saliva that contains digestive enzymes

Teeth that have multiple cusps (edges) for shearing, slicing, crushing, grinding; fall out and are replaced by permanent teeth

Long, cone-shaped teeth for piercing flesh

Secrete fat/oil that keeps mammal hair healthy; found all over the body; people have them on the face and scalp

Secrete sweat to help keep mammals cool; found mostly in hairless regions

Herbivorous mammal with stomachs that have multiple chambers; includes goats, cattle, deer

Feed on a diet of both plants and animals

Feed on a diet of mostly other animals

Transfers food to the stomach

Location in the body in which digestion is completed and absorption of water and nutrients begins; bile is secreted into this organ to break down fats

Produces bile; filters toxins and dead blood cells from the body

Soft, dense fur that helps to insulate mammals

A mammal's fur coat

Animal whose teeth vary in structure and function

Teeth with sharp edges for snipping and biting

Aquatic mammals with plates in their mouths for filtering tiny prey from water; have two blow holes for breathing

Aquatic mammals with teeth in their mouths; have one blow hole for breathing

How do the majority of bats navigate?

Even-toed hoofed mammals; most have two toes, some have four toes

Flesh-eating mammals that have teeth for tearing flesh

Rodent-like mammals with long, constantly growing incisors; second set of incisors behind the front set

Completely aquatic mammals that have flippers as limbs; blow hole for breathing; many navigate using echolocation; very large mammals; have either teeth or baleen plates for eating

Thick layer of fat that insulates mammals in very cold climates

Fleshy, external ears of mammals

The only mammals that can truly fly; their hand bones are modified to form wings; most use echolocation to navigate and hunt for food

Ability to regulate and maintain body temperature internally

Digestive organ that stores food

Portion of a bird's stomach that grinds food

Network of barbs and barbules of a feather

Hollow part of a feather; attaches to the bird's body

Hollow bones with air cavities that help birds decrease their body weight

Keeps birds from falling off their perch when asleep; allows raptors to grip and hold prey

Chicks that hatches naked and completely helpless and rely on parents to take care of them

Feathers that break apart to help waterproof the bird

Feathers that give a bird its outward appearance

Soft feathers hidden by the contour feathers; used as insulation

Chicks that are able to leave the nest immediately and can self-feed

Older baby bird that has left the nest and may still be fed by the parents

Bird's "voice box"

Structures within a bird's body that extend from the lungs and into the abdomen and long bones; stores fresh air; helps with buoyancy and temperature regulation

Pit-like organs in the roof of a snake's mouth; removes scent molecules from the tongue and transmit information to the brain

What type of movement is used by heavy-bodied snakes to silently stalk prey? Short portions of the snake's body are lifted and moved forward.

Snake movement in which the head is at an angle in relationship to the body, results in a sideways movement

Allows crocodilians and mammals to breathe through nostrils while the mouth is filled with food or water

Bottom shell of a turtle; "breastplate"

Dorsal shield; back shell of a turtle

How do turtles move air in and out of their lungs?

Venomous snakes that have heat sensitive pit organs; movable fangs; most venomous snakes in North America

Only venomous snake in the United States that is not a pit viper

What determines the sex of some reptile babies?