Phylum Cnidaria

Question 1

what are the classes of phylum cnidaria? (there are 4)

Answer 1

Hydrozoa (hydra, obelia, portugese man o war)

Anthozoa (coral, anemones)

Cubozoa (Box jellies)

Scypozoa (true jellies)

Question 2

what are general characteristics of phylum cnidaria? (There are 5)

Answer 2

1. cnidocytes (with nematocyst)
2. radial symmetry
3. tissue-level development- diploblastic
   a) body two cell layers thick
   b) epidermis-mesoglea-gastrodermis
4. gastrovascular cavity (mouth and anus are the same)

5.two body forms: polyp/medusa

Question 3

Body form of cnidaria?

Answer 3

Polyp: usually cesil, has radial symmetry, oral and aboral

Medusa: Oral surface down. Mobile

Question 4

Cnidaria Reproduction

Answer 4

Both sexual and asexual

Question 5

What are cnidaria?

Answer 5

Stinging organisms. Have cnidocytes, which are modified epidermal cells that sting and have nematocyst