Cnidaria Flashcards

1
Q

What species make up Cnidaria?

A

Jellyfish, hydra, coral, anemone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are Cnidaria like?

A

Marine, aquatic, carnivores, dimorphic body plan

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the structure of a polyp?

A

Gastrovascular cavity surrounded by mesoglea (jelly filling) then surrounded by epidermis, hollow tentacles. Pedal base (?)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the structure of a medusa?

A

Gastrovascular cavity surrounded by mesoglea then surrounded by epidermis, tentacles facing downwards (hollow)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a cnidocyte?

A

Barb. Contain organelle called Cnida or cnidocyst.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is hydrozoa?

A

Can have both forms but mainly polyp. Diverse with regards to shape, colonial, could look like a plant or polyp. Ex for mimicking polyp or jellyfish.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is Scyphozoa

A

Both forms but mainly medusa. True jellyfish.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Anthrozoa

A

Flower animals. Corals and sea anemone, polyp only, marine only, tropical, shallow H2O, hard Calcium carbonate case, some have mutualistic relationship with algae.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe the colonial Obelia

A

Hydrozoa, Hydranth for reproduction, perisarc is outside while coenosarc is inside, goangium for …,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How many germ layers do cnidarians have, name these germ layers and the adult derivatives

A

They have three germ layers, the exoderm (epidermis), the endoderm (gastrovascular cavity), separated my the filler mesoglea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the two cnidarian body plans?

A

Medusa and polyp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What features do Cnidarians have

A

tentacle, mouth, epidermis, mesoglea, gastrodermis, cnidocyte, also have a nerve net

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How do they catch food? How do they digest it?

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Is the gastrovascular cavity a secondary body cavity?

A

No, primary?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Radial vs biradial symmetry

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

WHere is the mouth located>

A

On the oral side. The anus is also here, one and the same?

17
Q

What is the function of the cnidocyte?

A

18
Q

What’s the lifecycle like of a true jellyfish? Which stages are mobile? Which one is a colony?

A

19
Q

When do sexual and asexual reproduction occur?

A

20
Q

How do medusa (jellyfish move? How do hydra (polyp) move?

A

21
Q

Are cnidarians predators or prey?

A

22
Q

What are the four Classes, differentiate them.

A

23
Q

What makes myxozoans different?

A

24
Q

Which ones can live in freshwater?

A

25
Q

why were ctenophores thought to be closely related to cnidarians

A

26
Q

What are cenophores like?

A

ctenophores are marine only, have colloblasts to collect food, 3 germ layers, and use ctenes for locomotion. Marine only. Its larval stage is a cydippid and is mobile.