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Posted By: Sanjana Member Level: Gold Posted Date: 14 Jun 2008
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2005 BL2001 - Animal Diversity Question paper
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SCHOOL OF BIOLOGY
Second Science
BL2001 - Animal Diversity
August 2005
Time allowed - 3 hours
Section A
Answer TWO questions from this section
Allow around 2 hours
Use a separate book for each answer
1. Write an essay on the evolution and diversity of feeding mechanisms in molluscs.
2. Compare and contrast the three rather distinct forms of reproduction that are found among living mammals.
3. Discuss, with evidence, theories about (a) the relatively sudden extinction of the dinosaurs AND (b) whether dinosaurs were endothermic.
4. Anthozoans are the most striking feature of tropical reefs yet are relatively simple in structure. Describe the main features of these animals and discuss the ways by which they have been able to develop such diversity and become so dominant in tropical and subtropical regions.
5. Describe the main features of chelicerate arthropods, and discuss how these features have affected the overall biology of the group.
6. Discuss the importance/
6. Discuss the importance of segmentation in annelid worms.
Section B
Answer ALL the questions
Allow 1 hour
Each question should take approximately 10 minutes
Answer questions in the same booklet
7. Write brief notes on THREE of the following:-
Self-evisceration in holothurians (sea cucumbers)
Mutable connective tissue (‘catch’ state) in echinoderms
Aristotle’s lantern
Pedicellariae
Eversible stomach in asteroids (sea stars).
8. EITHER
What are the two main theories that have been advanced to account for the evolution of multicellular animals from unicellular organisms?
OR
With the aid of diagrams explain the functional design of the introverts that occur in certain pseudocoelomate worms.
9. Write brief notes on the Cubozoa.
10. List FIVE insect groups that have had a major economic, medical or social impact on humans, and state briefly what that impact has been.
11. Describe THREE similarities and THREE differences between the hagfishes (Myxini) and the lampreys (Cephalospidomorphi).
12. Draw a labelled diagram of an echiuran worm.
____________________________
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