Phylum Cnidaria Flashcards
1
Q
what are the classes of phylum cnidaria? (there are 4)
A
Hydrozoa (hydra, obelia, portugese man o war)
Anthozoa (coral, anemones)
Cubozoa (Box jellies)
Scypozoa (true jellies)
2
Q
what are general characteristics of phylum cnidaria? (There are 5)
A
- cnidocytes (with nematocyst)
- radial symmetry
- tissue-level development- diploblastic
a) body two cell layers thick
b) epidermis-mesoglea-gastrodermis - gastrovascular cavity (mouth and anus are the same)
5.two body forms: polyp/medusa
3
Q
Body form of cnidaria?
A
Polyp: usually cesil, has radial symmetry, oral and aboral
Medusa: Oral surface down. Mobile
4
Q
Cnidaria Reproduction
A
Both sexual and asexual
5
Q
What are cnidaria?
A
Stinging organisms. Have cnidocytes, which are modified epidermal cells that sting and have nematocyst