external rings. Describe true segmentation in annelids. How is the true segmentation in annelids differ from having rings around the ectoderm as in nematodes? 3. What two layers of muscles exist in annelids? Which muscle layer‚ present in platyhelminthes‚ is absent in annelids? 4. Earthworms (class oligochaeta) and marine polychaete worms (class polychaeta) have bristles (“chaetes”) protruding from their body segments‚ while leeches (class hirudinea) lack these bristles. What is
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able to float around the area (Raven et al‚ 2005). Other than that‚ animals that have an ectoderm‚ mesoderm and entoderm can be categorized as having three germ layer and these animals have bilateral symmetry. Round worms that belong to the phylum Nematoda are said to have three germ layers. Nematodes generally have unsegmented bodies and they have a thick‚ flexible cuticle that molts four times as they grow bigger. Their muscles can be found beneath the epidermis and extends along the body of the
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Animal Phylum Poster/Display Project Each student will select a major group of animals to research and ultimately create a poster or display to help explain the group of animals belonging to each class. Be sure to first read your textbook on the group as well as consult general resources before getting into specific resource materials. Students will be graded primarily on the content of the information as well as the creativity of the poster or display. The entire project is worth 75 points
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Bryan A. Khan Dipylidium caninum This is a guide to inform you of the Dipylidium caninum parasite known as the flea tape of the tape worms. The following information will inform you on what it looks like‚ the host this parasite prefers‚ where it prefers to infect‚ clinical signs‚ a method of treatment‚ a method of prevention‚ and the public health significance. When dealing with a parasitic problem your first thought might be what is it and how to treat it? We are here to help!
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subdivisions within the Protostomia _ Builds a cuticle‚ an outer layer of organic material that functions as its skeleton _ Cuticle is regularly shed (ecdysis) _ Have separate sexes and copulate Ecdysozoa Cuticle – nematode and arthropod Phylum Nematoda (15‚000 species) (Gr. nematos‚ thread) _ marine‚ freshwater‚ terrestial or parasitic _ long cylindrical body _ cuticle (cortical‚ matrix and fibrous) _ hydrostatic skeleton _ longitudinal muscles only _ pseudocoelom (false body cavity) _ complete
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CHAPTER NO-5 KINGDOM ANIMALIA Phylum Porifera (GK: Porous = Pores + Ferro = form) Main characters: 1. They are commonly called as sponges. 2. They are sessile animals. 3. Sponges range in height from about 1cm to 2cm. 4. More than 5000 species of sponges are found. 5. All are marine‚ while some are fresh water. 6. The central body cavity is called spongocoel. 7. A single large opening is called as osculum. 8. They are filter feeders. 9. Body lining is formed by flagellated cells
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Opisthokonta: Metazoa II: Eumetazoa: Bilateria: Protostomia: Ecdysozoa Objectives: • Know the key features of the Phylum Nematoda. Know how they relate to other metazoan phyla. • List the key characteristics of the Phylum Arthropoda. Identify examples. List the four subphyla and their key distinguishing features. Identify examples of the subphyla Chelicerata‚ Crustacea‚ Myriapoda‚ and Hexapoda. • Be able to identify the different structures on these organisms and understand their function. • Understand
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Diversity in Living Organisms Q 1 Name the branch of the biology that deals with the classification. Q 2 Who was the first to propose the two-kingdom system of classification? Q 3 Who proposed three-kingdom classification? Q 4 What is meant by triploblastic? Q 5 What is haemocoel ? Q 6 Name the person who has given the five-kingdom classification. Q 7 Which is the largest phylum of animal kingdom? Q 8 What is the function of canal system in sponges? Q 9 What are Gymnosperms
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N10/4/BIOLO/HPM/ENG/TZ0/XX 88106001 Biology HigHer level PaPer 1 Tuesday 2 November 2010 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8810-6001 17 pages © International Baccalaureate Organization 2010 – 2 – 1. N10/4/BIOLO/HPM/ENG/TZ0/XX [Question and image
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follows that of their environment. INVERTEBRATE INTEGUMENTS Protozoa- delicate cell membrane (Amoeba) Coelenterata- epidermis‚ single layer of cells (e.g. corals and Hydra) Annelida- epidermis contains non-cellular cuticle (e.g. earthworm) Platyhelminthes- epidermis contain contains resistant cuticle (e.g. liver fluke and tape worm.) Arthropoda- chitin (e.g. shrimp‚ crabs‚ lobster and insects) Mollusca- shell (clams‚ mussels and oysters) VERTEBRATE INTEGUMENTS I. EPIDERMIS - outer‚ thinner
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