Tutorial: Ecdysozoa

Question 1

Nematoda tissue type

Answer 1

triploblastic

Question 2

Nematoda symmetry

Answer 2

bilateral

Question 3

body cavity in Nematoda

Answer 3

pseudoceolomate

Question 4

development in Nematoda

Answer 4

protostome

Question 5

segmentation in Nematoda

Answer 5

no

Question 6

cephalization in Nematoda

Answer 6

yes

Question 7

the digestive system in Nematoda

Answer 7

alimentary canal

Question 8

excretory system Nematoda

Answer 8

diffusion through skin

Question 9

the circulatory system in Nematoda

Answer 9

absent

Question 10

respiration in Nematoda

Answer 10

diffusion

Question 11

respiration in Nematoda

Answer 11

diffusion

Question 12

reproduction in Nematoda

Answer 12

sexual

Question 13

nervous system in Nematoda

Answer 13

small bundle of ganglia

Question 14

other key traits of Nematoda

Answer 14

1.Movement with longitudinal
muscles only (no circular
muscles like annelids)

Question 15

taxa in Nematoda

Answer 15

1. parasitic
2. free-living

Question 16

Arthropoda tissue type

Answer 16

triploblastic

Question 17

Arthropoda symmetry

Answer 17

bilateral

Question 18

body cavity in Arthropoda

Answer 18

coelomates but much reduced

Question 19

development in Arthropoda

Answer 19

protostome

Question 20

segmentation in Arthropoda

Answer 20

NO

Question 21

cephalization in Arthropoda

Answer 21

YES

Question 22

digestive tract Arthropoda

Answer 22

alimentary canal

Question 23

excretory system

Answer 23

1. alimentary canal
2. grasshoppers - Malpighian tubules

Question 24

the circulatory system in Arthropoda

Answer 24

open circulatory system
(grasshoppers have heart)

Question 25

respiration in Arthropoda

Answer 25

Aquatic: gills/feathery extensions,
cuticle exchange (smaller crustaceans)

Terrestrial: Tracheal tubes or book lungs
(arachnids)

Question 26

reproduction in Arthropoda

Answer 26

usually sexual

Question 27

nervous system in Arthropoda

Answer 27

1. dorsal brain with ventral nerve cords and bundles (ganglia)

Question 28

other key traits of Arthropoda

Answer 28

1. Jointed, paired appendages,
2. Exoskeleton made of chitin.
3. Body divided into three parts; head,
   thorax, abdomen

Question 29

taxa in Arthropoda

Answer 29

(1) Chelicerates (spiders, ticks, mites,
scorpions, horseshoe crabs)
(2) Myriapods (centipedes & millipedes)
(3) Pancrustaceans (lobsters, crustaceans,
insects & relatives)

Question 30

correct this list for Nematoda:
protostome, segmented, dioecious, circular muscles, ecdysis, open circulatory system

Answer 30

1. segmented = should be unsegmented
2. circular muscles - ONLY longitudinal muscles
3. open circ system = circ system is ABSENT

Question 31

Arthropoda- blastopore forms anus, reduced coelom, open circulatory system, chitin endoskeleton

Answer 31

1. blastophore forms mouth (protostome)
2. chitin EXOskeleton

Question 32

do arthropods have a reduced coelom

Answer 32

YES

Question 33

what do arthropods have EXCEPT:
1. protostome development
2. bilateral symmetry
3. pseudocelom
4. 3 germ layers
4. true tissue

Answer 33

pseudocoelom

Question 34

why are insects so successful

Answer 34

they have wings

Question 35

which is NOT a crustacean
1. coral
2. lobster
3. shrimp
4. barnacle
5. crab

Answer 35

2. coral