arthropods have a hard outer skeleton and

a. jointed appendages

b. four chambered heart

c. hair

d. backbone

lobsters, insects and spiders are all examples of

a. vertebrates

b. arthropods

c. monerans

d. amphibians

the appendages of arthropods

a. may serve as walking legs

b. may be modified into antennae

c. may be modified into large pincers

d. all of the above

characteristics of arthropods include

a. chitinous skeleton

b. segmentation

c. jointed appendages

d. all of the above

millipedes feed mainly on

a. crustaceans

b. wood products

c. other insects

d. decaying plants

crayfish, shrimp, lobsters and crabs are examples of

a. uropods

b. copepods

c. decapods

d. hemipods

spiders: subphylum chelicerata::

a. crayfish: subphylum crustacea

b. centipedes: subphylum crustacea

c. scorpions: crustacea

d. millipedes: crustacea

arachnid's pedipalps: two::

a. spider's gills: six

b. chelicerate's appendages: twelve

c. arachnid's walking legs: six

d. arachnid's chelicerae: eight

centipedes

a. have two pairs of legs per segment and eat decaying matter

b. have one pair of legs per segment and eat other animals

c. have two pairs of legs per segment and eat other animals

d. have one pair of legs per segment and eat decaying matter

spiders, scorpions, and ticks belong to the class

a. chordata

b. arachnida

c. crustaea

d. isoptera

crabs, lobsters, shrimp and barnacles are members of the subphylum

a. crustacea

b. centipeda

c. arachnida

d. diptera

the abdomen of a crayfish is covered by the

a. carapace

b. nauplius

c. thorax

d. ossicle

a crayfish is a

a. crustacean

b. chelicerate

c. nymph

d. insect

spiders use silk to

a. build their nests

b. encase prey

c. trap prey

d. all of the above

molting in arthropods occurs in response to

a. pressure

b. hormonal action

c. enzyme action

d. all of the above

mits and ticks differ from other arthropods in that

a. they are parasitic

b. they are small

c. their cephalothorax and abdomen are fused together

d. they have pedipalps

in what way are lobsters similar to spiders

a. they have segmented bodies

b. they have exoskeletons

c. they have jointed appendages

d. all of the above

the exoskeleton of arthropods and the skin of vertebrates both

a. are waterproof coatings of the bodies

b. provide physical support to the body

c. have joints that allow movement

d. are necessary for sensing sound vibrations

the appendages that scorpions and spiders use to capture and handle their prey are called

a. walking legs

b. diptera

c. uropods

d. pedipalps

all of the following are arthropods except

a. centipedes

b. spiders

c. crabs

d. clams

crayfish: swimmerets for swimming and reproduction::

a. shrimp: telson for chewing

b. crabs: telson for eating

c. crustaceans: gills for breathing

d. lobsters: uropods for reproduction

spiders, scorpions and horseshoe crabs belong to the subphylum

a. chelicerata

b. crustacea

c. chordata

d. arthropoda

spiders appendages include the walking legs, the celicerae and the

a. spinnerets

b. antennae

c. pedipalps

d. cephalothorax

the exoskeleton of arthropods is

a. an internal structure made up of bones and cartilage

b. moist and thin

c. a stiff, water resistant outer coat composed of chitin

d. none of the above

jointed appendages of arthropods may

a. become specialized for particular functions

b. function in feeding

c. function in locomotion

d. all of the above

the small organs used by spiders to produce silk are called

a, spinnerets

b. silk nozzles

c. pedipalps

d. mouthparts

if all copepods died,

a. lyme disease would cease to be a problem

b. nothing would change

c. predators that depend on them would easily find substitute food sources

d. the supply of plankton would be greatly reduced

a similarity between annelids and arthropods is that they both have

a. exoskeletons made of chitin

b. the ability to fly

c. segmented body patterns

d. well developed lungs for respiration

spiders typically have

a. three body segments and six walking legs

b. two body segments and eight walking legs

c. two body segments and four walking legs

d. none of the above

the exoskeleton of arthropods is made of a material called

a. spongin

b. mesoglea

c. chitin

d. none of the above