Invertebrates 3 nematodes, arthropods & echinoderms

Adult invertebrates 3 nematodes arthropods

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Invertebrates 3 Nematodes, arthropods & echinoderms Page 6 of 8 (ii) Complete metamorphosis (e.g. dipterans, caddis flies, beetles) - Eggs - Larva - Pupa - Adult 5. Crustaceans 5.1 Representatives (a) Decapods (b) Isopods (c) Copepods (d) Others 5.2 General characteristics of crustaceans (e.g. lobster) (a) Highly specialized appendages (b) Lost appendages are regenerated in the next molt
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Invertebrates 3 Nematodes, arthropods & echinoderms Page 7 of 8 Echinoderms (Phylum Echinodermata) 1. Main characteristics (a) Calcareous endoskeleton under a thin epidermis (b) Bilateral symmetry in larvae (c) Water vascular system (d) Internal organs replicated in each arm (e) Gametes released to the water 2. Representatives (a) There are 6 main groups 3. Water vascular system (e.g. sea star Fig. 33.39) (a) Components
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Invertebrates 3 Nematodes, arthropods & echinoderms Page 8 of 8 (b) How it works (i) Foot on substrate (ii) Foot off substrate 4. Feeding (a) Small prey can be eaten whole (b) Large prey (e.g. mussels & clams) 5. Autonomy & regeneration
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  • Spring '10
  • Dr.DavidCreasey
  • Biology, General characteristics, phylum arthropoda, Phylum Echinodermata, Phylum Nematoda

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