20 polychaete

Question 1

majority of annelids once belonged to what class?

Answer 1

polychaeta

Question 2

polychaeta is a term of

Answer 2

conveinence

Question 3

what does the term polychaeta imply

Answer 3

presence of many chaetaew

Question 4

where is most of the anatomical diversity on polychaetes

Answer 4

head and parapodia

Question 5

what does prostomium contain

Answer 5

tentacles, palp, and sense organs like eyes

Question 6

what surrounds mouth

Answer 6

peristomium

Question 7

what is eversible in polychaete, and hwat does it have?

Answer 7

pharynx is eversible, has jaws

Question 8

parapodia parts

Answer 8

notopodium- dorsal lobe
neuropodium- ventral one
-many chatae
-acicula(supporting chaetae)

Question 9

what are parapodia for?

Answer 9

locomotion and gas exchange

Question 10

how do polychaetes move?

Answer 10

crawling, swimming, burrowing, are sedentary

Question 11

how do polychaetes move?(motion)

Answer 11

-longitudinal muscles alternately contract and relax in opposing sunchrony
-produces waves from posterior to anterior
-parapodia on opposite sides are exactly out of phase

Question 12

what happens in recovery stroke

Answer 12

parapodia and chaetae retract in wave throughs.

Question 13

what happens in ppower stroke

Answer 13

-parapodia and chaetae are extended m,aximally in power stroke as they pass along the crest of wave

Question 14

in slow crawling

Answer 14

higher number of undulations
short wavelength
low amplitude

Question 15

fast crawling

Answer 15

greater length and amplitude of undulation, but fewer

Question 16

swimming
what type of polychaetes are efficient at this

Answer 16

wavelength and amplitude are greatest, however sometimes this can cause animal to go in reverse
-pelagic polychaetes are efficient

Question 17

do polychaetes reproduce asexually

Answer 17

yes, they bud.

Question 18

polychaete sexual reproduction

Answer 18

broadcast spawning of sperm and eggs

Question 19

polychaete fertilization

Answer 19

external

Question 20

polychaete sexes,when does sexual repro happen

Answer 20

seperate sexes, and gonads are temporary, only breeding seasons

Question 21

what is a cool property of polychaetes

Answer 21

regenerationwhe

Question 22

where are sperms and eggs released

Answer 22

nephridiopores or rupture of worms body

Question 23

how do some polychaete gonads distance

Answer 23

epitoky

Question 24

epitoky

Answer 24

part transforms into non beeding bag of gametes that swims away before exploding

Question 25

which individuals are better equipped fir swimming

Answer 25

epitokous

Question 26

what do individuals that reproduce during full moons have

Answer 26

larger eyes for light detection

Question 27

what do polychaetes with external fertilizatoin have

Answer 27

trochophore larva

Question 28

polychaete trochophore larva are

Answer 28

plankotrophic, meaning they feed

Question 29

drooded polychaete larva exhibit

Answer 29

lecithotrophy

Question 30

how does transformation into juveniles take place oin polychaetes

Answer 30

several segmented larval stages

Question 31

errantia vs sedentaria polychaetes

Answer 31

errantia are active and often predatory
sedentaria are sedentary or sessile and particle feeders that burrow/ tube live

Question 32

what clade does sedentaria include

Answer 32

clitellata

Question 33

how do polychaetes catch prey

Answer 33

every pharynx armed with jaws

Question 34

polychaetes whattype of feeding

Answer 34

suspension feeding and deposit feeding

Question 35

chaetopterus

Answer 35

makes mucus bag that filters out particles

Question 36

deposit feeding

Answer 36

1) general ingestrion of sediments
2) sort through via feeding appendages and seectively eat

Question 37

what do selective deposit feeders normally have

Answer 37

palps subdevided into dozens of sticky tentacles

Question 38

what is common among sedentaria with tubes

Answer 38

deposit and suspension feeding

Question 39

tubes of sedentaria are made of

Answer 39

calcareous or made of mucus

Question 40

siphuncula

Answer 40

penut worms
taxa in polychaetes

Question 41

num spp of siphuncula

Answer 41

150

Question 42

what do sipuncula lack

Answer 42

chaetae, circ syst, evidence of segmentation

Question 43

what do sipuncula have two of?

Answer 43

eucoelomic cevities

Question 44

what type of gut to sipuncula have

Answer 44

u shaped

Question 45

how do sipuncula feed

Answer 45

deposit feeding

Question 46

thalassematidae

Answer 46

clade within polychaetes

Question 47

thalassematidae features

Answer 47

lack segmentation
one pair of ctenidia

Question 48

thalassematidae larva features

Answer 48

segmented nervous system in larvae and juveniles

Question 49

how do thalassematidae feed

Answer 49

deposit feeding

Question 50

thalassematidae how many spp

Answer 50

220

Question 51

two distinctive parts of thalassematidae body

Answer 51

trunk and proboscis

Question 52

what do thalassematidae exibit in sexuality

Answer 52

sexual dimorphosm

Question 53

sexual dimorphism

Answer 53

one sex waaaaay larger than other

Question 54

siboglinidae

Answer 54

taxa in polychaeta

Question 55

siboglinidae spp

Answer 55

180

Question 56

siboglinidae habitat

Answer 56

hydrothermal vents, methane seeps, whale carcasses

Question 57

body regions of siboglinidae

Answer 57

has 3, first w tentacles
last with segmented opisthosoma

Question 58

gut in siboglinidae

Answer 58

lack gut, rely on symbiotic bacteria in tentacles or internal trophosome

Question 59

what does the boneworm eat

Answer 59

bones, with the help of symbiotic bacteria