Cnidaria Part 2

Question 1

What is an obelia

Answer 1

colonial hydrozoan

Question 2

what two polyp structures are found on an obelia colony

Answer 2

gastrozooid and gonozooid

Question 3

The medussa can create sperm and eggs which join to form a ….

Answer 3

planula

Question 4

flap that allows propulsion by pushing water out through a small hole and letting it in through a big hole

Answer 4

vellum

Question 5

This form in the life cycle of aurelia undergoes strobilation until the top layer of tissue differentiates into ephyra

Answer 5

Strobilia (wow, a name that actually makes sense)

Question 6

This form of the aurelia life cycle grows and differentiates into the medusa

Answer 6

Ephyra

Question 7

This form of the aurelia life cycle changes from a planula to a polyp anchored to the substrate.

Answer 7

Scyphistoma

Question 8

What is the role of the gonozooid in an obelia colony

Answer 8

They create medusa polyps

Question 9

What is the role of the gastrozooid in an obleia colony

Answer 9

It functions as a gatherer of food for the colony

Question 10

What is the role of the rhopalium

Answer 10

detects gravity and light.

Question 11

What is the role of statocysts

Answer 11

Contain statoliths that give the cnidaria gravity detection and a sense of balance.