2- Nematoda and Chelicerata

Question 1

• posses a cuticle
• do not share common body plan

Answer 1

Ecdysozoa

Question 2

(in ecdysozoa)
- hardened, nonliving external layer secreted by epidermis
- molten when the animal grows via ecdysis

Answer 2

cuticle

Question 3

• roundworms
• can occur as parasites in plant/animals/free living in soil & aquatic environments
• bilaterally symmetrical
• elongate and tapered at both ends

Answer 3

nematodes

Question 4

a fluid-filled body cavity between the digestive tract and the body wall that some nematode species possess

Answer 4

pseudocoel

Question 5

nematodes secrete a cuticle made of _____ that is periodically molted

Answer 5

collagen

Question 6

3 most common sites of infection of nematode parasites

Answer 6

digestive tract
circulatory system
respiratory system

Question 7

• largest animal phylum
• the earliest phylum to develop true flight
• joint appendages
• more specialized segmentation
• open circulatory system

Answer 7

arthropoda

Question 8

segments of arthropods; another word

Answer 8

tagmata

Question 9

arthropod segment for sensory and feeding

Answer 9

heada

Question 10

arthropod segment for locomotion

Answer 10

thorax

Question 11

arthropod segment for visceral organs

Answer 11

abdomen

Question 12

arthropod exoskeleton made of _____ or ______

Answer 12

chitin; calcium carbonate

Question 13

4 extant arthropod subphyla

Answer 13

chelicerata
myriapoda
crustacea
hexapoda

Question 14

1 extinct arthropod subphylum

Answer 14

trilobita

Question 15

arthropod extant subphyla:
-includes spiders, ticks, mites, scorpions
- 4 pairs of walking legs

Answer 15

chelicerata

Question 16

head and thorax segments fused in chelicerata

Answer 16

cephalothorax

Question 17

moutparts unique to chelicerata

Answer 17

chelicerae