Lecture 11

Question 1

Zooecium

Answer 1

exoskeleton secreted by metasome

Question 2

Introvert

Answer 2

The anterior part of the body forms an introvert, within which the lophophore and tentacles can be withdrawn

Question 3

Coelomophores

Answer 3

A cilliated groove in the mesothelium along which

eggs move to be released to the environment

Question 4

Autozooids

Answer 4

feeding zooids

Question 5

Heterozooids

Answer 5

non feeding zooids

Question 6

Avicularia

Answer 6

jaw like mechanism used for defense

Question 7

Vibracula

Answer 7

large cilia like structure use to keep colony clean, sometimes for locomotion

Question 8

Bryozoan colonies

Answer 8

stolonate (hydroid shaped), Foliaceous (leaf like), Fruticose (flower like), Encrusting (most common)

Question 9

Statoblast formation

Answer 9

Colony arises from asexual reproduction from single sexually produced larva, or resting bud (statoblast)

Question 10

Chaetognatha

Answer 10

found in all marine environments, major predators (grasping spines)