21 phylum clitellata

Question 1

what do phylum clitellata all share

Answer 1

clitellum

Question 2

what groups are part of clitellata

Answer 2

oligochaetes and hirudinea

Question 3

how many chaetae do hirundinea have vs oligochaetes

Answer 3

hirudinea great majority have none,
oligochaetes have few

Question 4

spp oligochaetes

Answer 4

7500

Question 5

oligochaetes habitat

Answer 5

terrestrial and freshwater

Question 6

oligochaetes diet

Answer 6

detrivores

Question 7

what type of segments do oligochaetes have

Answer 7

homonomous

Question 8

what does homonomous

Answer 8

relatively simmilar segments

Question 9

do oligochaetes show lots of modifications

Answer 9

few modifications to head or body

Question 10

do oligochaetes have parapodia? describe the chaetae

Answer 10

chaeta are they are short and inconspicuous
they dont have parapodia

Question 11

what type of movement does oligochaetes demonstrate

Answer 11

peristaltic movement- accordion like

Question 12

what muscles work when oligochaetes move

Answer 12

longitudinal and circular muscles that extend to narrow body and contract to thicken the body

Question 13

In oligochaetes which muscle causes shortening in thge body

Answer 13

circular muscles

Question 14

In oligochaetes which muscle causes elongation in thge `body

Answer 14

longitudinal muscles

Question 15

when are chaetae exended oligochaetes

Answer 15

when longitudinal muscles contract, help gain traction

Question 16

what type of cavity do oligochaetes have

Answer 16

eucoelomic cavities

Question 17

what type of circ syst oligochaetes

Answer 17

closed

Question 18

sexes in oligochaetes

Answer 18

hermaphroditic

Question 19

how is sperm transfered oligochaetes

Answer 19

copulation

Question 20

difference in gonads oligochaetes vs polychaetes

Answer 20

gonads are permanent in oligochaetws

Question 21

where is asexual reproduction common in oligochaetes

Answer 21

BUDDING in freshwater species

Question 22

what type of development oligochaetes

Answer 22

direct

Question 23

what type of larva oligochaetes

Answer 23

no trochophore

Question 24

where is fertilization

Answer 24

external

Question 25

what do some species use for copulation

Answer 25

some use penises and some use external sperm grooves

Question 26

what does clitellum produce

Answer 26

proteinaceous ring that acts as cocoon

Question 27

how does proteinaceous ring act like cocoon

Answer 27

first eggs are excruded onto cocoon then sperm is extruded onto eggs

Question 28

what is cocoon resistant to

Answer 28

drying

Question 29

how do oligochaetes feed

Answer 29

via direct deposit feeding or eat leaf litter

Question 30

what is class hirudinida

Answer 30

leeches

Question 31

hirudinida spp

Answer 31

700

Question 32

hirudinida habitat

Answer 32

mostly freshwater, some marine and terestrial

Question 33

how many segments hirudinida

Answer 33

34 true segments

Question 34

what do hirudinida have on anterior and posterior

Answer 34

suckers

Question 35

hirudinida sexes

Answer 35

hermaphroditic

Question 36

what describes coelom of hirudinida

Answer 36

not compartmentalized, reduced to narrow channels and body cavity filled w resilient spongy tissue

Question 37

what muscles flatten out body

Answer 37

dorsoventral muscles

Question 38

how do hirudinida move

Answer 38

inchworm fashion

Question 39

what are some blood feeding adaptations hirudinida

Answer 39

pumping pharynx anticoagulant and anaesthetic

Question 40

how do some other hirudinida feed

Answer 40

some are predatory

Question 41

how does fertilization happen hirudinida

Answer 41

internal, through penis or traumatic insemination

Question 42

what role does cocoon have in hirudinida fertilization

Answer 42

cocoon recieves zygots or embryos some leeches hang onto cocoons and brood babies

Question 43

class of leech w oinly one sucker

Answer 43

acanthobdellida

Question 44

what characterizes acanthobdellida

Answer 44

oinly one sucker have some chaetae

Question 45

what do acanthobdellida feed on

Answer 45

bl;ood feeding parasites of fish

Question 46

what class of leech is associated w crayfish why?

Answer 46

branchiobdellida possible cleaning symbiosis mutualists

Question 47

branchiobdellida suckers and chaetae

Answer 47

both anterior and posterior suckers no chaetae

Question 48

ecological end economic importance of annelida

Answer 48

soil fertility plant growth food compositng and medicine

Question 49

importance of annelida for paracites

Answer 49

hosts for myxozoans