Phylum Annelida

Question 1

Phylum Annelida Eumetazoa

Answer 1

Yes

Question 2

Phylum Annelida Radiata or Bilateria?

Answer 2

Bilateria

Question 3

Phylum Annelida Dueterstomia or Protostomia?

Answer 3

Protostomia

Question 4

Phylum Annelida Acoelomate, Pseudocoelomate or Coelomate?

Answer 4

Coelomate

Question 5

Phylum Annelida Diploblastic or Triploblastic?

Answer 5

Triploblastic

Question 6

Phylum Annelida Invertebrate or Vertebrate?

Answer 6

Invertebrate

Question 7

Annelida

Answer 7

segmented worms – earthworms – leeches – sandworms – tubeworms

• Three tissue layers – coelom
• bilateral symmetry
• Unique feature – nepheridia – kidney like function
• Terrestrial and aquatic forms
• Some monoecious (hermaphroditic), some dioecious
• Feed on organic material, body fluids and other animals

Question 8

Class Polychaeta

Answer 8

Include bristle worms, clamworms, sandworms and fire worms

• Have parapodia – paddles for swimming on each segment with imbedded setae (spine like)
• Dioecious
• Distinct head with eyes and tentacles
• Marine habitat

Question 9

Class Oligochaeta

Answer 9

• Monoecious (hermaphroditic)
• Have setae but no parapodia
• The fluid filled coelom serves as a hydroskeleton to assist in movement
• Have a clitellum which secretes a cocoon containing its eggs
• Terrestrial and freshwater habitats
• Assisted by setae for burrowing and locomotion

Question 10

Class Hirudinea

Answer 10

(“Leech”)

• Monoecious (hermaphroditic) – having a clitellum that secretes a cocoon containing its eggs
• Has a hydroskeleton
• Has two suckers – anterior for feeding and posterior for anchoring
• Some are active predators while other are ectoparasites (blood suckers)
• Terrestrial, freshwater and marine habitats