ACTIVITY 1 - PHYLUM PORIFERA L. porus (pore); ferre (to bear) The sponges belong to phylum Porifera. Unlike the rest of the animal kingdom, they have a loose body organisation. There are approximately 5000 marine species and 150 freshwater species of sponges. Sponges live at all depths in the sea and range in size from a few millimetres up to 2 m. Water carrying food and oxygen is drawn through the sponge through pores by the beating of flagella on the choanocytes (cells that line the internal cavity). Using your text book and the PowerPoint slides, answer the following questions about the key characteristics of the phylum Porifera. Type of symmetry: Do sponges have distinct cell layers or tissues and organs? Name the cells of the inner cell layer and their features: How do sponges get food and energy? How do sponges move?
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Step 2: Sponges do not have distinct cell layers or tissues and organs. Step 3: The cells of the inner cell layer are choanocytes, which have flagella that beat to draw water carrying food and oxygen through the sponge. Step 4: Sponges get food and energy by Show more…
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There's no question that among invertebrate animal phyla, the Porifera are different from all other groups. But what is it that qualifies this phylum as an 'animal'? Please explain/describe the characteristics of sponges that cause them to be included in the monophyletic animal clade AND some features that separate them from the other major phyla: NOTE - This question is not asking for a description of sponges, but is asking for an explanation (based on characteristics) WHY they qualify as animals and how they differ (based on characteristics) from most other animal groups. Full credit will be given for complete and accurate, organized explanations.
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8. Describe sexual reproduction of Porifera, including details about the life cycle. (1 mark) 9. What structures and materials make up the skeletons of Porifera? Describe and draw a sketch (1 mark) Complete the table by writing a cell type or structure in sponges that fits each description. (4 marks) Type of Cell or Structure Description 10. Aid in reproduction and nutrient transport. Helps produce spicules. 11. Form the outside surface of the sponge body. Contract to close porocytes. 12. Line the interior of sponges' body. Use flagella to draw water through pores. 13. Found as a jellylike substance between the two layers. Make up sponges' support system.
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Which phylum shows tissue level of organization? (a) Protozoa (b) Porifera (c) Coelenterate (d) All of these
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