Biology-Annelids/mollusks

Question 1

Oligochaeta

Answer 1

Earthworm

Question 2

Polychaeta

Answer 2

Fanworm

Question 3

Hirudinea

Answer 3

Leeches

Question 4

Setae

Answer 4

Small bristle like structures used in moving

Question 5

Parapodia

Answer 5

Leg like structures

Question 6

Circular and longitudinal muscles

Answer 6

Used to contract and pull the earthworm forward

Question 7

Nephridia

Answer 7

Long tubes used to excrete waste

Question 8

Pharynx

Answer 8

Draws soil into the mouth and passes it into the corp

Question 9

Corp

Answer 9

Temporary storage organ that adds water if needed

Question 10

Gizzard

Answer 10

Soil is moved here to be ground up and freeing organic matter

Question 11

Long straight intestine

Answer 11

Organic matter is degiested and nutrients are absorbed into the blood

Question 12

Fused ganglia

Answer 12

Acts as the earthworms brain

Question 13

Ventral nerve cord

Answer 13

Runs the length of the earth worm and carries messages to the rest of the segments

Question 14

Sensory receptors

Answer 14

Earthworms posses these to sense light temperature vibrations. Located in their skin

Question 15

Clitellum

Answer 15

Mucus that is produced give the sperm a medium to travel

Question 16

What is the cocoon made up of

Answer 16

Mucus and chitin

Question 17

How do earthworms respirate

Answer 17

Gas exchange over their skin (diffusion)

Question 18

Aortic arches

Answer 18

Pumps blood throughout the worm

Question 19

How do Polychaeta move

Answer 19

The use the parapodia

Question 20

How do ploychaetes reproduce

Answer 20

Sexually

Question 21

Do hirudinea have parapodia or setae

Answer 21

No they have niether

Question 22

What sex are leeches

Answer 22

They are both hermaphrodite

Question 23

How do parasitic leaches attach to their sucker

Answer 23

With anterior and posterior suckers

Question 24

What does a leech do when it bites its prey

Answer 24

Secretes chemicals to reduce pain

Question 25

What characteristics do most Annelids and mollusks share with members of Porifera

Answer 25

Filter feeding

Question 26

Fanworms live in tubes of mucus and ________?

Answer 26

Sand

Question 27

Do polychaetes posses parapodia and setae

Answer 27

Yes, they have. Parapodia and bundles of setae

Question 28

Mantle

Answer 28

Present In mollusks, soft outer layer of their bodies

Question 29

Foot

Answer 29

Used for locomotion or attachment

Question 30

Visceral mass

Answer 30

Contains most of the internal organs

Question 31

What type of digestive system do mollusks posses

Answer 31

They have a complete one way disgestive system

Question 32

How do mollusks excrete waste

Answer 32

Nephridia, but they only posses one or two

Question 33

Polyplacophora

Answer 33

Chitons 2-5 cm long with overlapping plates

Question 34

Radula

Answer 34

Tongue like structure with teeth

Question 35

What surrounds a polyplacophora

Answer 35

A thick layer of mucus protects the object

Question 36

Gastropoda

Answer 36

Largest class and contain one piece shells

Question 37

How do Gastropoda respirate

Answer 37

Gills

Question 38

Bivalva

Answer 38

Have 2 shells

Question 39

Cephalopoda

Answer 39

Large brain and complex nervous system (squid)

Question 40

Closed circulatory system

Answer 40

More efficient but complex way moving nutrients throughout the body

Question 41

Open circulatory system

Answer 41

Pumps the blood into open cavities to transport the oxygen and nutrients required