| 1. |
What are the whiplike flagellated cells of a sponge called? |
|
|
|
|
|
|
|
|
a) |
Spicules |
|
b) |
Collar Cells |
|
c) |
Amebocytes |
|
|
|
|
|
|
| 2. |
What does a sponge produce Gemmules for? |
|
|
|
|
|
a) |
They are pointy crystals that support the shape of the sponge. |
|
b) |
They create the flow of water through a sponge by moving rythmically in the sponge cavity. |
|
c) |
They help the sponge to survive through hard times. |
|
d) |
They sting the sponges prey |
|
|
|
|
|
|
| 3. |
Which of the following describes the life cycle of a Cnidarian? |
|
|
|
|
|
|
|
|
a) |
Gametes are released in to the water, fertilzation forms a larvae which will eventually become a new jellyfish |
|
b) |
Polyps reproduce asexually to form jellyfish like medusas, The Medusa in turn makes male or female gametes. Gametes will be released into the water and fertilization is random and depends on luck. Fertilization will produce new polyps. |
|
c) |
Cnidarians can only reproduce asexually by budding |
|
d) |
Polyps reproduce asexually to form jellyfish like medusas, The Medusa in turn makes male or female gametes. Males fertilize the females internally. Fertilization will produce new polyps. |
|
|
|
|
|
|
| 4. |
The gastrovascular cavity that Jellyfish and Flatworms have serves this purpose: |
|
|
|
|
|
|
|
|
a) |
Digestion |
|
b) |
Circulation of nutrients |
|
c) |
Light sensory structure |
|
d) |
Both A and B |
|
|
|
|
|
|
| 5. |
Which of these groups has Bilateral symetry, a complete digestive system and separate sexes? |
|
|
|
|
|
|
|
|
a) |
Porifera |
|
b) |
Cnidaria |
|
c) |
Nemaatodes |
|
d) |
Playtyhelmenthes |
|
|
|
|
|
|
| 6. |
Which of the following describes the arrangement of cell layers in the Cnidarians? |
|
|
|
|
|
|
|
|
a) |
The spongeocoel is on the inside and the pores are separated by a mesenchyme |
|
b) |
Endoderm is innermost, Mesoglea is in the middle, Ectoderm is outermost |
|
c) |
Endoderm is outermost, Mesoglea is in the middle, Ectoderm is innermost |
|
d) |
Mesoglea is the innermost, endoderm is next, with the ectoderm on the outside. |
|
|
|
|
|
|
