Arthropoda

Question 1

(Trilobita) Origins date from before the ________ period; extinct for _______ million years - _______ fossil

Answer 1

Cambrian, 200, index

Question 2

(Trilobita) Trilobed body - ________, _________ & ________ (tail)

Answer 2

Cephalon, trunk, pygidium

Question 3

(Trilobita) Head w/ ________, ________ eyes and appendages but no true ________.

Answer 3

Antennae, compound, mouthparts

Question 4

(Trilobita) _________ trunk - pill bug like

Answer 4

Segmented

Question 5

(Trilobita) Flattened __________, ________ feeder, scavenger

Answer 5

Dorsoventrally, bottom

Question 6

(Trilobita) Ranged in size from ________ to _______ long.

Answer 6

1 inch, 6 feet

Question 7

(Chelicerata) Means “_____________” - modification of the other appendages.

Answer 7

Having mouthparts

Question 8

(Chelicerata) ________ pairs of appendages from cephalothorax including a single pair of _______ (mouth parts), a single pair of ________ - handling and sense of touch, _____ pairs of walking legs.

Answer 8

Six, chelicerae, pedipalps, four

Question 9

(Chelicerata) No…

Answer 9

Antennae

Question 10

(Chelicerata) Feed by _______________ from prey - use of digestive enzymes.

Answer 10

Sucking liquified food

Question 11

(Merostomata, Eurypterid) _____________; largest of all arthropods, now extinct.

Answer 11

Giant water scorpions

Question 12

(Merostomata, Eurypterid) Cephalon of ______ fused segments w/ both ________ & _________, chelicerae & pedipalps

Answer 12

Six, simple, compound eyes

Question 13

(Merostomata, Eurypterid) _______ pairs of walking legs & segmented abdomen

Answer 13

Four

Question 14

(Merostomata, Eurypterid) ________ telson or tail.

Answer 14

Spiked

Question 15

(Merostomata, Xiphosurida) These are the…

Answer 15

Horseshoe crabs

Question 16

(Merostomata, Xiphosurida) A living fossil; unchanged since the…

Answer 16

Triassic

Question 17

(Merostomata, Xiphosurida) Body w/ ______, hinged ________ & ________ telson.

Answer 17

Carapace, abdomen, spiked

Question 18

(Merostomata, Xiphosurida) Appendages: ________, _______ & ________ pair walking legs.

Answer 18

Chelicerae, pedipalps, four

Question 19

(Merostomata, Xiphosurida) __________ on abdomen.

Answer 19

Book gills

Question 20

(Merostomata, Xiphosurida) _______ compound eyes, ______ simple eyes.

Answer 20

Lateral, medial

Question 21

(Merostomata, Xiphosurida) ___________ in wet sand at high tideline; eggs hatch & young return to the sea at a subsequent high tide.

Answer 21

External fertilization

Question 22

(Pycnogonida) Are the…

Answer 22

Sea spiders

Question 23

(Pycnogonida) _______ body & legs (~3 ft)

Answer 23

Long thin

Question 24

(Pycnogonida) ________ of segments may add more sets of walking legs.

Answer 24

Repetition

Question 25

(Pycnogonida) Respiration thru _______; _______ circulation.

Answer 25

Exoskeleton, limited

Question 26

(Arachnida) Two tagmata (________ & ________).

Answer 26

Cephalothorax, abdomen

Question 27

(Arachnida) Cephalothorax w/ ______ pair of chelicerae, pedipalps & _____ pair of walking legs (_______ on abdomen)

Answer 27

One, four, NONE

Question 28

(Arachnida) Abdomen w/ __________, ________ & ______ organs.

Answer 28

Reproductive, respiratory, digestive

Question 29

(Arachnida, Araneae) Cephalothorax & abdomen, chelicerae may be modified into ________, pedipalps for tactile & __________, _______ inside abdomen.

Answer 29

Fangs, sperm transfer, book lungs

Question 30

(Arachnida, Araneae) Excretion by ___________ which filter wastes & dump into intestines where water can be reabsorbed, _______ to ______ simple eyes; sensilla detect ________.

Answer 30

Malpighian tubules, zero, eight, vibrations

Question 31

(Arachnida, Araneae) Silk glands & spinnerets produce ____________, reproduction by ________, _______ fertilization; female lays ________.

Answer 31

Liquid protein thread, courtship, internal, fertilized eggs

Question 32

(Arachnida, Araneae) Females usually much ________, males are practically just sperm donors (huge ______ for transfer) → many killed post fertilization to reduce ________ for young and provide _______.

Answer 32

Larger, pedipalps, competition, nourishment

Question 33

(Arachnida, Scorpiones) Cephalothorax w/ small ________ & larger pincer-like ________.

Answer 33

Chelicerae, pedipalps

Question 34

(Arachnida, Scorpiones) Pair of large ________ eyes with other _______ eyes.

Answer 34

Median, lateral

Question 35

(Arachnida, Scorpiones) Preabdomen (________) w/ segments.

Answer 35

Unhinged

Question 36

(Arachnida, Scorpiones) Long, slender flexible post abdomen (______) w/ telson (_______).

Answer 36

Hinged, stinger

Question 37

(Arachnida, Opiliones) These are the...

Answer 37

Harvestmen

Question 38

(Arachnida, Opiliones) Abdomen & cephalothorax _________.

Answer 38

Almost fused

Question 39

(Arachnida, Opiliones) Two eyes set forward on...

Answer 39

Tubercle

Question 40

(Arachnida, Opiliones) _______ pairs of long, thin legs.

Answer 40

Four

Question 41

(Arachnida, Opiliones) Chelicerae are pincer-like; _________, Poisonous NOT venomous

Answer 41

Carnivorous

Question 42

(Arachnida, Acari) These are...

Answer 42

Ticks & mites

Question 43

(Arachnida, Acari) Mouth parts extend _______ of body.

Answer 43

Forward

Question 44

(Arachnida, Acari) Many have no _____ - sensory adaptations to find _____.

Answer 44

Eyes, host

Question 45

(Arachnida, Acari) ________ fusion of cephalothorax & abdomen.

Answer 45

Complete

Question 46

(Arachnida, Acari) Many are ________ at some stage.

Answer 46

Ectoparasites

Question 47

(Arachnida, Acari) Ticks are 2 mm to 3cm; Mites less than 1 mm, many are _________ in mammalian hair follicles.

Answer 47

Endemic