12

Question 1

Aschelminthes

Answer 1

Chaetognatha
Nematode
Nematopmorpha
Priap7lida
Rotifera

Question 2

phylum in aschelminthes

Answer 2

Chaetognatha
Nematoda
Nematomorpha
\Priapulida
Rotifera

Question 3

Chaetognatha spp

Answer 3

150

Question 4

Nematoda spp

Answer 4

27,000

Question 5

Nematomorpha spp

Answer 5

365

Question 6

Priapulida spp

Answer 6

22

Question 7

Rotifera includes

Answer 7

Acanthocephala

Question 8

Acanthocephala spp

Answer 8

3300

Question 9

Chaetognatha habitat

Answer 9

marine

Question 10

Chaetognatha diet

Answer 10

predatory

Question 11

what describes where chaetognatha swim

Answer 11

nektonic

Question 12

nektonic

Answer 12

swims in the open water
column

Question 13

Chaetognatha

Answer 13

arrow worm

Question 14

Chaetognatha molecular phylogenetic analyses
place them with

Answer 14

Protostomia
however has deuterostome-like characrteristics

Question 15

Chaetognatha nervous syste,m

Answer 15

ventral nerve cord
circumoesophageal connectives

Question 16

what deuterostome-like characteristics does Chaetognatha have?

Answer 16

-multiple eucoelomic cavities arising from process similar to enterocoely
-the mouth does not develop from the blastopore

Question 17

what is phylum chaetognaths suggested to be?

Answer 17

transitional phylum b/w proto- and deuterostomes
however, molecular studies say protostome spiralian clade Gnathifera

Question 18

what supports chaetognaths as transitional phylum

Answer 18

fossils from Burgess Shale

Question 19

morphological features of chaetognaths

Answer 19

three sets of eucoeloms
post-anal tail
-fins
-eyes
-grasping spines

Question 20

chaetognaths sexes

Answer 20

hermaphrodites

Question 21

sperm transfer methods chaetognaths

Answer 21

sperm placed right at
the entrance to one of the two female genital
openings
or
jizz placed on body and streams over the epidermis and enters female shi

Question 22

fertilization chaetognaths

Answer 22

internal

Question 23

development Chaetognatha

Answer 23

direct
neither mouth nor anus come from the blastopore

Question 24

how do Chaetognatha subdue prey

Answer 24

neurotoxin: tetrodotoxin

Question 25

how do Chaetognatha avoid preation

Answer 25

transparent

Question 26

Phylum Rotifera habitat

Answer 26

freshwater, marine and terrestrial

Question 27

Acanthocephala

Answer 27

all endoparasites included in rotifera

Question 28

why were rotifers and acanthocephalans considered closely related

Answer 28

unusual syncytial epidermis with a dense intracellular protein layer

Question 29

Non-acanthocephalan Rotifera

Answer 29

among the smallest of all bilaterians

Question 30

Non-acanthocephalan Rotifera movement

Answer 30

cilia via the corona

Question 31

rotifers body cavity

Answer 31

pseudocoelomate

Question 32

Non-acanthocephalan Rotifera solitary or colonial

Answer 32

solitary few are colonial

Question 33

are Non-acanthocephalan Rotifera free-swimming or sedentary

Answer 33

most are free-swimming some are sedentary

Question 34

what do sedentary Rotifera do

Answer 34

build cases out of sand or their own fecal pellets

Question 35

what do some rotiferas protect themselves with

Answer 35

armor called a lorica

Question 36

eutely

Answer 36

no longer grow by adding cells but though each cell getting larger

Question 37

rotifers pharynx has

Answer 37

mastax

Question 38

mastax

Answer 38

internal mouthparts inside the pharynx made of smaller parts called trophi

Question 39

Gnathifera what do they share in common

Answer 39

complex mouthparts of Rotifera

Question 40

Non-acanthocephalan Rotifera what do they yse for water balce

Answer 40

protonephridia

Question 41

do Rotifera have nervous system

Answer 41

simple nervous system

Question 42

Rotifera eyes

Answer 42

eyespots detect light but don’t form images

Question 43

development Rotifera

Answer 43

direct development

Question 44

sexes Rotifera

Answer 44

several hundred species are completely parthenogenetic- never have males

Question 45

in species w males and females what do they engage in

Answer 45

cyclic parthenogenesis

Question 46

cyclic parthenogenesis of rotifers

Answer 46

-diploid daughters by amictic females when environment good -haploid sons by mictic females when environment deteriorates -males copulate w females

Question 47

rotifers that never have males

Answer 47

anhydrobiosis- dont die when dried out

Question 48

cilia in rotifers functions

Answer 48

both locomotion and feeding

Question 49

rotifers diet

Answer 49

small particles or active hunters

Question 50

Seisonidea

Answer 50

group of ectoparasitic rotifers live on the bodies of crustaceans

Question 51

Seisonidea coronas

Answer 51

very reduced

Question 52

Seisonidea reproduction

Answer 52

sexually

Question 53

clade thought to be sister to the parasitic Acanthocephala

Answer 53

Seisonidea

Question 54

Acanthocephala

Answer 54

group of Rotifera that is exclusively endoparasitic

Question 55

what are the hosts of Acanthocephala

Answer 55

vertebrates (final hosts) and insects and crustaceans (intermediate hosts)

Question 56

Acanthocephala characteristics

Answer 56

large pseudocoelom have no mouth or gut spiny anterior end

Question 57

sperm transfer Acanthocephala

Answer 57

copulation

Question 58

difference b/w acanthocephalans and free living rotifers lifecycle

Answer 58

clear larval stages in acanthocephalans

Question 59

whart are acanthocephalans famous for

Answer 59

manipulation of intermediate hosts