Lab 7 - Annelids and Nematoda

Question 1

Annelida - What are they commonly called?

Answer 1

Segmented Worms (have septa)

Question 2

Annelida - Are they lophotrochozoa or ecdysozoa?

Answer 2

Lophotrochozoa

Question 3

Annelida - What kind of symmetry do annelida have?

Answer 3

bilateral

Question 4

Annelida - They were first to develop ____

Answer 4

Parapodia - paired appendages

Question 5

Annelida - What is the level of organization?

Answer 5

Organ-system

Question 6

Annelida - How germ layers do annelida have?

Answer 6

3 germ layers - they are triploblastic

Question 7

Annelida - What kind of body cavity do they have?

Answer 7

Coelom

Question 8

Annelida - What kind of digestion do they have?

Answer 8

Complete

Question 9

Annelida - What kind of circulation do they have?

Answer 9

closed, with multiple hearts

Question 10

Annelida - How do they respire?

Answer 10

Through their skin, gills, or parapodia

Question 11

Annelida - What specialized structures do they have for digestion?

Answer 11

pharynx, crop, gizzard

Question 12

Annelida - What kind of nervous system do they have?

Answer 12

Cerebral ganglia, ventral nerve cord

Question 13

Annelida - What kind of support system do they have?

Answer 13

Hydrostatic skeleton

Question 14

Annelida - Do they have a cuticle and do they shed it?

Answer 14

Yes and no they do not shed it

Question 15

Annelida - How do they locomotion?

Answer 15

Parapodia (some) and setae

Question 16

Annelida - How do they excrete themselves?

Answer 16

Nephridia

Question 17

Annelida - What structure secretes a cocoon?

Answer 17

Clitellum

Question 18

Annelida - What is special about the class polychaeta?

Answer 18

Many, many parapodia, they have no clitellum

Question 19

Annelida - What is special about the class oligochaeta?

Answer 19

Few setae, their clit is permanent, no parapodia

Question 20

Annelida - What is special about the class Hirudinea?

Answer 20

no parapodia/setae (no feetsies), anterior and posterior suckers, clit only during reproduction

Question 21

Nematoda - Are they lophotrochozoa or ecdysozoa?

Answer 21

Ecdysozoa

Question 22

Nematodes - What is their level of organization?

Answer 22

Organ-system

Question 23

Nematodes - What is their symmetry?

Answer 23

bilateral

Question 24

Nematodes - What kind of digestion do they have?

Answer 24

Complete

Question 25

Nematodes - What kind of circulatory system do they have?

Answer 25

Nada

Question 26

Nematodes - HOw do they respire?

Answer 26

well they don’t have a system so diffusion

Question 27

Nematodes - What kind of body cavity do they have?

Answer 27

Pseudocoelom

Question 28

Nematodes - What kind of support do they have?

Answer 28

Hydrostatic skeleton, only longitudinal muscles, cuticle

Question 29

Nematodes - What is a cuticle and do nematodes shed it?

Answer 29

A cuticle is a non-cellular, flexible covering of the ectoderm and yes it must be shed

Question 30

Annelida - What are parapodia and what are setae? How are they related to each other?

Answer 30

Parapodia - paired legs
setae - bristle like extensions that help movement
setae can be found on parapodia

Question 31

Are annelida and nematoda protostomes or deuterostomes?

Answer 31

Protostomes

Question 32

Annelida - What segments the worm?

Answer 32

septa

Question 33

Annelida - What is an animal found in the class polychaeta?

Answer 33

Clam worms

Question 34

Annelida - What is an animal found in the class oligochaeta?

Answer 34

Earth worm

Question 35

Annelida - What is an animal in the class hirudinea?

Answer 35

leeches

Question 36

What is a common name for nematodes?

Answer 36

roundworms

Question 37

Most nematodes are ____?

Answer 37

parasites