Nematocysts - PowerPoint PPT Presentation

Invertebrate Biology

Invertebrate Biology. Chapter 33. Phylogentic Relationships of Animals. Platyhelminthes. Porifera. Mollusca. Chordata. Arthropoda. Annelida. Cnideria. Nematoda. Echinodermata. pseudocoelom. segmentation. acoelom. Protostome: schizocoelem. Deuterostomes: eucoelom. radial symmetry.

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Phylum Cnidaria

Phylum Cnidaria. Chapter 26. Cnidaria A. Contains 1. Corals 2. Jelly fish (sea jellys) 3. Sea anemones 4. Hydra B. All live underwater and nearly all live in the ocean, and all have external fertilization. C. Unlike sponges 1. Cnidarians have layers of differentiated

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Ch 26- Sponges and Cnidarians

Ch 26- Sponges and Cnidarians. What characteristics do all animals share? Members of kingdom Animalia , multicellular , eukaryotic heterotrophs , lack cell walls Invertebrates- animals that do not have a backbone 95% of all animal species Range in size from dust mites to giant squids

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