Every class has its own unique features Complete the following questions It

Every class has its own unique features complete the

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Every class has its own unique features. Complete the following questions. It will be regarded as prior knowledge for the practical and / or application questions that will be discussed during the contact sessions. 1. Discuss the position of the Annelida in the animal kingdom. 2. Describe the characteristics of the Annelida by completing TABLE 1. 3. Compare the characteristics of the three classes of Annelida by completing TABLE 2. 4. Explain the following terms: 4.1 prostomium 4.2 peristomium 4.3 parapodium 4.4 setae 4.5 hydrostatic skeleton 4.6 Chaetae 4.7 Clitellum 5. Distinguish between the following “cavities: a vacuole, coel enteron, enteron, pseudocoelom and a coelom. 6. Explain what is implied by the terms metamerism, segments, annuli, metameres and somites. 7. Give a summary of the functional and evolutionary advantages metamerism and being in possession of a coelom cavity offer the first possessors thereof.
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Study unit 3 37 8 Distinguish between the terms acoelomate animals, pseudocoelomate animals and coelomate animals by means of drawings. In each case name one phylum in which you will find this body form. Does this condition have any relation to the developmental level of the organism? 9. Label the diagram below using the bold printed words in the introductory paragraph above. (13) 10. Answer the following questions based on the following figure:. ,. 10.1 Label and colour the diagram showing the regions of the digestive system (green), parts of the reproductive system (male blue, female pink), blood system (red) and nervous system yellow. 10.2 Critically evaluate the implications of possessing metameric segmentation. 10.3 What advantages could the possession of a digestive system with different regions have for the animal? 11. Compare a nephridium and a flame cell by making labelled drawings of each? 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11
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Study unit 3 38 Control your own answers. Discuss problems during contact session Practical Microscope work of slides and / or fresh/preserved material will be studied during the contact session. If fresh material is available a dissection of an earthworm may be done. Additional reading/ viewing To see Hirudinea in action, go to: (shows habitat of leeches) ( shows “leech therapy”) (shows “leech therapy”) (“farming” with leeches) Polychaetae are abundant in the sea some of them are found in the deepest sea trenches (the abyss). The BBC video/ DVD series, Blue planet, in the episode “The deep” shows these deep-sea tube-worms, up to two metres tall and with bright red fans to absorb oxygen from the water. Read more about these” creatures of the abyss” at the URL below:
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Study unit 3 39 3.7 PHYLUM ARTHROPODA On completion of this study section you should be able to: Name the general characteristics of the phylum Arthropoda.
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  • Spring '16
  • Ambani Mudau
  • Phylum, Windelspecht

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