Zoology: Porifera, Cnidaria, Platyhelminthes, Nemertea and Chaetognatha

Question 1

Corals, unlike many Cnidarians, spend their adult lives in what form?

Accepted Answer

Polyp

Question 2

Which is the appropriate life cycle for a Cnidarian such as a jellyfish?

Accepted Answer

Egg->Larva->Polyp->Medusa

Question 3

What do sponges NOT have... that EVERY other animal in the animal kingdom does?

Accepted Answer

Tissues

Question 4

Choose the correct path of a water molecule through a sponge.

Accepted Answer

Pores->Collar cells->Osculum

Question 5

Identify the phylum of this animal: Stabilizing lateral fins, head spines, aquatic.

Accepted Answer

Chaetognatha

Question 6

Which Platyhelminthes class has a scolex and proglottids?

Accepted Answer

Cestoda

Question 7

What forms the simple brain of flatworms, arrow worms, and ribbon worms?

Accepted Answer

Ganglia

Question 8

Which term refers to the back of an organism?

Accepted Answer

Dorsal

Question 9

What do flatworms use for gas exchange?

Accepted Answer

Diffusion

Question 10

Which other mammal, other than humans, has been found to use sponges as tools?

Accepted Answer

Dolphin

Question 11

What is the name for the fibers that make up a sponge's "skeleton"?

Accepted Answer

Spicules

Question 12

What animal(s) does phylum Cnidaria include?

Accepted Answer

Jellyfish, Corals

Question 13

What class of Platyhelminthes usually is an ectoparasite on fish?

Accepted Answer

Monogenea

Question 14

What are the two small black dots shown clearly at the anterior end of this Dugesia specimen?

Accepted Answer

Eyespots

Question 15

If I asked you to make a cut anterior to the median section of a banana, where would you cut?

Accepted Answer

Above the middle

Question 16

What are the fringe-like structures found around the edge of this Aurelia bell (dyed pink)?

Accepted Answer

Marginal tentacles

Question 17

Flatworms, ribbon worms, and arrow worms belong, but NOT sponges or cnidarians:

Accepted Answer

Lophotrochozoa, Protostomia, Bilateria

Question 18

Nemertea are commonly known as...

Accepted Answer

Ribbon worms

Question 19

What type of poriferan cell has the ability to transform into other cell types?

Accepted Answer

Amoebocyte

Question 20

What type of symmetry does a sponge have?

Accepted Answer

Asymmetry

Questions 20