Year 11 Biology SAC Name: ______
Part A: Termites, Protozoa and Bacteria
1. In the space below, is a picture of a protistan from the termite’s gut. Label the following structures: nucleus, flagellum, wood particles (1½ marks)
2. What function is served by the flagellum? ______( ½ mark)
3. What is the approximate length (top to bottom) of the protistan?
______(1 mark)
4. What is meant by the term mutualism? (1 mark)
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5. Why must newly hatched termites be fed anal exudates by worker termites?
(1 mark)
6. One compound that is used by pest controllers on termite colonies is Sulfurimid. Sulfurimid is a slow acting poison that kills the protozoa in the worker termite’s gut. Explain why these protozoans are important to the survival of the termites. (2 marks)
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7. Several weeks after the application of sulfurimid, the termites excrete droppings containing only chewed wood. Explain why this has occurred. (2 marks)
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Part B: Comparison of Mammalian Skulls
8. The Indian Antelope has the following dental formula:
0 0 3 3
3 1 3 3
a. Suggest a likely diet of this animal. Justify your answer. (2 marks)
b. What is the total number of teeth this animal would have? (1 mark)
c. The lion is a carnivore. Describe the likely shape of its molars and pre-molars.
(1 mark)
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d. Would you expect the molars and premolars of the lion and the Indian Antelope to have the same function. Justify your answer. (2 marks)
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9. The skull shown below is from a badger. What is the likely diet of this animal? Justify your answer. (2 marks)
10. Label the following tooth types on this skull: incisors, canines and molars.
(3 marks)
Part C: Digestive Systems
11. The diagram opposite shows the
digestive tract of a horse. Is the horse a
fore-gut or hind-gut fermenter. Justify
your answer. (2 marks)
12. Ring-tailed possums are hind-gut fermenters. Explain why they produce two different types of droppings (pellets). (3 marks)
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