arnesslaurel.files.wordpress.com file · Web viewPHYLUM CNIDARIA. Characteristics and Advances: 1....
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Ms. Arness Name: Block: Biology 11 Date: PHYLUM CNIDARIA Characteristics and Advances: 1. Have True tissues diplobastic 2. Radial Symmetry 3. Have a nerve net nervous system (statocysts and ocelli) 4. Incomplete digestive system Show “alteration of generations ” with a polyp and medusa stage 6. Contain cnidocytes (nematocysts) 7. Are all predators 8. Reproduce asexually by budding and sexually by motile gametes 9. Found in both fresh and salt water TWO MAIN BODY PLANS 1. Medusa 2. Polyp Tentacle Outer Epithelium Mouth Mesoglea Gastrovascular cavity
Transcript of arnesslaurel.files.wordpress.com file · Web viewPHYLUM CNIDARIA. Characteristics and Advances: 1....
Ms. Arness Name: Block: Biology 11 Date:
PHYLUM CNIDARIA
Characteristics and Advances:
1. Have True tissues
diplobastic
2. Radial Symmetry
3. Have a nerve net nervous system (statocysts and ocelli)
4. Incomplete digestive system
Show “alteration of generations ” with a polyp and medusa stage
6. Contain cnidocytes (nematocysts)
7. Are all predators
8. Reproduce asexually by budding and sexually by motile gametes
9. Found in both fresh and salt water
TWO MAIN BODY PLANS
1. Medusa 2. Polyp
Class Hydrozoa
Polyp stage is dominant Medusa is used for species dispersal
Examples: Hydra sp . and Obelia sp
Tentacle
Outer Epithelium
Mouth
Mesoglea
Gastrovascular cavity
Inner Epithelium
Ms. Arness Name: Block: Biology 11 Date:
Class Anthozoa
Generally have polyp stage only Include: anemones, corals and sea pens
Class Scyphozoa
Medusa stage is dominant Includes the jellies
Jellyfish Life cycle – check textbook page 567
