Tutorial: Lophotrochozoan

Question 1

Platyleminthe tissue type

Answer 1

triploblastic

Question 2

symmetry in Platyleminthe

Answer 2

bilateral

Question 3

body cavity in Platyleminthe

Answer 3

acoelomates

Question 4

development in Platyleminthe

Answer 4

protostome

Question 5

is there segmentation in Platyleminthe

Answer 5

NO

Question 6

is there cephalization in Platyleminthe

Answer 6

YES

Question 7

describe the digestive tract inPlatyleminthe

Answer 7

gastrovascular cavity (one hole)

Question 8

excretory system in Platyleminthe

Answer 8

flame cells (AKA protonephridia)

Question 9

circulatory system in Platyleminthe

Answer 9

absent or diffusion

Question 10

respiratory system in Platyleminthe

Answer 10

absent - diffusion

Question 11

reproduction in Platyleminthe

Answer 11

hermaphroditic

Question 12

the nervous system in Platyleminthe

Answer 12

small bundle of nerves (ganglia)

Question 13

other key traits of Platyleminthe

Answer 13

dorsoventrally flattened

Question 14

taxa in Platyleminthe

Answer 14

Catenulida
1. chain worms

Rhabditophora
1. Free-living = planarians
2. parasitic (trematodes and tapeworms)

Question 15

tissue type of Rotifera

Answer 15

tripoblastic

Question 16

symmetry in Rotifera

Answer 16

bilateral

Question 17

body cavity in Rotifera

Answer 17

pseudocoelomate

Question 18

development in Rotifera

Answer 18

protostome

Question 19

segmentation in Rotifera

Answer 19

yes

Question 20

cephalization in Rotifera

Answer 20

yes

Question 21

digestive system in Rotifera

Answer 21

alimentary canal (2 holes)

Question 22

excretory system in Rotifera

Answer 22

diffusion

Question 23

circulatory system in Rotifera

Answer 23

diffusion

Question 24

respiratory system in Rotifera

Answer 24

diffusion

Question 25

reproduction in Rotifera

Answer 25

parthenogenesis

Question 26

the nervous system in Rotifera

Answer 26

small bundle of nerves (ganglia)

Question 27

other key traits of Rotifera

Answer 27

1. jaws in the pharynx 2. head with ciliated crown

Question 28

other taxa in Rotifera

Answer 28

NONE

Question 29

Mollusca tissue type

Answer 29

triploblastic

Question 30

symmetry in Mollusca

Answer 30

bilateral

Question 31

body cavity in Mollusca

Answer 31

coelomates

Question 32

development in Mollusca

Answer 32

protostome

Question 33

segmentation in Mollusca

Answer 33

no

Question 34

cephalization in Mollusca

Answer 34

yes

Question 35

digestive system in Mollusca

Answer 35

alimentary canal

Question 36

excretory system in Mollusca

Answer 36

nephridia and excurrent siphon

Question 37

the circulatory system in Mollusca

Answer 37

open in all except cephalopods

Question 38

respiration system in Mollusca

Answer 38

marine = gills in mantle cavity terrestrial/freshwater = mantle cavity forms "lungs"

Question 39

reproduction in Mollusca

Answer 39

very diverse

Question 40

nervous system in Mollusca

Answer 40

nerve cord and ganglia (brain well developed in cephalopods)

Question 41

other key traits of Mollusca

Answer 41

1. three MAIN parts of the body (mantle, visceral mass, foot) 2. many have a mantle cavity and radula

Question 42

taxa in Mollusca

Answer 42

1. chitons/Polyplacophora 2. bivalves 3. gastropods 4. cephalopods

Question 43

tissue type in Annelida

Answer 43

triploblastic

Question 44

symmetry in Annelida

Answer 44

bilateral

Question 45

body cavity in Annelida

Answer 45

coelomates

Question 46

development in Annelida

Answer 46

protostome

Question 47

segmentation in Annelida

Answer 47

yes

Question 48

cephalization in Annelida

Answer 48

yes

Question 49

digestive system in Annelida

Answer 49

alimentary canal

Question 50

excretory system in Annelida

Answer 50

metanephridia

Question 51

circulatory system in Annelida

Answer 51

closed

Question 52

respiratory system in Annelida

Answer 52

1. absent in most (diffusion across skin) 2. gills in marine species

Question 53

reproduction in Annelida

Answer 53

hermaphrodites OR fragmentation

Question 54

nervous system in Annelida

Answer 54

nerve cords and bund (cerebral ganglia)

Question 55

other key traits of Annelida

Answer 55

1. hydrostatic skeleton 2. movement with longitudinal and circular muscles

Question 56

taxa in Annelida

Answer 56

1. Errantians 2. Sedentarians (earthworms, leeches, tubeworms)