zoology arthropods and mollusks

Question 1

where are arthropods found

Answer 1

any environment

Question 2

what is the difference between an open an closed circulatory system?

Answer 2

closed systems keep blood in veins, open systems pump blood into body

Question 3

What kind of circulatory system do mollusks have?

Answer 3

open

Question 4

what kind of circulatory system do arthropods have?

Answer 4

open

Question 5

what is the name of the body cavities where blood collects in open circulatory systems?

Answer 5

hemocoel

Question 6

what is the difference between biramous appendages and uniramous appendages?

Answer 6

biramous appendages are branched, uniramous appendages aren’t

Question 7

what is ecdysis?

Answer 7

molting

Question 8

why do arthropods molt?

Answer 8

in order to grow

Question 9

what part of the mollusk secretes the shell? what is it made of?

Answer 9

secreted by mantle, made of CaCO3

Question 10

general body plan of hexapods

Answer 10

head, thorax, and abdomen

Question 11

general body plan of chelicerates?

Answer 11

cephalothorax and abdomen

Question 12

general body plan of myriapods

Answer 12

head and trunk

Question 13

grasshopper vs. crayfish: which has more body segments? which has more walking legs?

Answer 13

the grasshopper has 3 body segments, crayfish have 2 segments. Grasshoppers have 3 pairs of legs, crayfish have 5 legs (1 of which are claws)

Question 14

which arthropod most likely first lived on land?

Answer 14

millipedes

Question 15

What characteristics of arthropods allowed them to transition from aquatic to terrestrial life?

Answer 15

book lungs; first absorbed oxygen as a gas, not from water
exoskeleton; keeps shape outside of water, keeps animal dry

Question 16

what are chelicerae? how are they used by chelicerates?

Answer 16

they are pointed mouthpieces, used to catch prey

Question 17

where are the legs and wings attached to the body of a typical hexapod?

Answer 17

thorax

Question 18

etymology of mollusca

Answer 18

soft body

Question 19

etymology of arthropoda

Answer 19

jointed foot

Question 20

compare number of legs on millipedes and centipedes

Answer 20

millipedes have 2 appendages per segment, centipedes have 1 appendage per segment

Question 21

what are exoskeletons made of?

Answer 21

chitin

Question 22

arthropod reproduction

Answer 22

sexual, internal

Question 23

what is the largest and second largest animal phylum?

Answer 23

arthropoda, then mollusca

Question 24

what is a carapace?

Answer 24

hard plate covering the thorax and head (ex. turtle shell)

Question 25

respiratory structures of hexapods

Answer 25

tracheae

Question 26

respiratory structures of crustaceans

Answer 26

gills

Question 27

respiratory structures of arachnids

Answer 27

lungs and tracheae

Question 28

what do most millipedes eat?

Answer 28

rotting wood or fruit, other plants

Question 29

what do most centipedes eat?

Answer 29

bugs

Question 30

how do major mollusk groups move?

Answer 30

with their foot (jets with cephalopods)

Question 31

how do major mollusk groups feed?

Answer 31

with radula (mouth for cephalopods)

Question 32

common chelicerates

Answer 32

spiders, scorpions, horseshoe crab

Question 33

common crustaceans

Answer 33

lobster, crab, krill

Question 34

common hexapods

Answer 34

ants, beetle, moth

Question 35

common myriapods

Answer 35

centipedes, millipedes

Question 36

living fossil

Answer 36

horseshoe crab

Question 37

largest arthropod

Answer 37

hexapod

Question 37

how does the cephalopod’s foot compare to other mollusks?

Answer 37

they turned into arms

Question 38

what are three body parts common across all mollusks

Answer 38

head, foot, visceral mass

Question 39

common bivalves

Answer 39

oysters, clams, mussels

Question 40

common cephalopods

Answer 40

octopus, squid, nautilidae

Question 41

common gastropods

Answer 41

snails, slugs

Question 42

characteristics shared by all arthropods

Answer 42

segmented body, jointed appendages, bilateral symmetry, exoskeleton