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1 UNIVERSITY OF EAST ANGLIA School of Biological Sciences Main Series UG Examination BIODIVERSITY BIO-4001A Time allowed: 2 hours Answer ALL questions in Section A, ONE question from Section B and ONE question from Section C. Write answers to EACH SECTION in the Answer Grid or SEPARATE booklet. The maximum number of marks available for your answers in SECTION A is 40 marks The maximum number of marks available for your answer in SECTION B is 30 marks The maximum number of marks available for your answer in SECTION C is 30 marks The TOTAL number of marks available for the paper is 100 Numbers in square brackets [ ] indicate the relevant mark applied to each part of the question. Notes are not permitted in this examination. Do not turn over until you are told to do so by the Invigilator. BIO-4001A Module Contact: Dr Mark Coleman, BIO Copyright of the University of East Anglia Version 2

2 2 SECTION A: MULTIPLE CHOICE AND SHORT ANSWER QUESTIONS Answer ALL questions. Answer multiple choice questions in the answer grid provided and attach this to your booklet for Section A. 1. Sponges are believed to have evolved from which group of protist? a) Choanoflagellates b) Apicomplexans c) Amoeba d) Ciliates e) Euglenids 2. There are four groups of cephalopod: Nautilus and Octopus are two. What are the other two? a) Tunicates and Enteropneusta b) Jelly fish and anemones c) Anemones and sponges d) Aplacophorans and monoplacophorans e) Squid and cuttlefish 3. Which of the three subphyla of Arthropod contain extant species? a) Trilobitomorpha and Chelicerata b) Trilobitomorpha and Mandibulata c) Chelicerata and Mandibulata d) Mandibulata, Trilobitomorpha and Chelicerata e) Only Mandibulata 4. Which combination of true and false fit the statements below? [2 marks] i. Flat worms are acoelomates ii. Nematodes are pseudocoelomates iii. Annelids are coelomates a) False, False, True b) True, True, True c) True, True, False d) False, False, False e) True, False, True Section A continues on next page/...

3 3 Section A continued Which combination of organisms are believed to share the most recent common ancestor? a) Urochordata and annelids b) Echinoderms and chordates c) Molluscs and sea squirts d) Arthropods and amphibians e) Nematodes and Cephalochordata 6. During the Cambrian era, at what percentage of present day levels was the concentration of Oxygen? a) 0.01% b) 0.1% c) 1% d) 10% e) 100% 7. The fossil invertebrate Hallucigenia is believed to be most closely related to which modern invertebrate phylum? a) Onchorphyra b) Annelida c) It is not believed to be related to any modern day phylum d) Arthropoda e) Nematoda 8. Which one of the following is not in the Gnathostomata lineage? a) Tuatara b) Osteichthyes c) Hagfish d) Bowfin e) Cetacea Section A continues on next page/... TURN OVER

4 4 Section A continued What key specialist characteristics allow chameleons to be particularly well suited to an arboreal life style? a) Cloaca b) Highly modified tongue c) Stereoscopic eyes d) Zygodactylous feet e) Chromatophores in skin 10. Which combination of true/false answers is correct for the following statements? [2 marks] i. Liverworts are vascular plants ii. Selaginella is a land plant with alternation of generations iii. Equisetum is a living member of the Sphenophyta a) False, True, true b) True, False, False c) True, True, True d) False, false, true e) False, false, false 11. Which combination of plants below all have microphylls rather than megaphylls? a) Polytrichum, Brachythecium, Sphagnum b) Dryopteris, Ginkgo, Taxus c) Taxus, Polytrichum, Brachythecium d) Ginkgo, Sphagnum, Taxus e) Brachythecium, Ginkgo, Sphagnum 12. Which collection of features is found in Pinus? a) Carpel, tracheid, no embryo sac b) Naked ovule, tracheid, embryo sac c) Carpel, vessel, embryo sac d) Naked ovule, tracheid, no embryo sac e) Naked ovule, tracheid, embryo sac Section A continues on next page/...

5 5 Section A continued Which collection of features is found in a seed? a) Testa, cotyledon, receptacle b) Pericarp, cotyledon, receptacle c) Pericarp, receptacle, micropyle d) Testa, receptacle, micropyle e) Testa, cotyledon, micropyle For all remaining questions in Section A, please use an answer booklet. Remember to attach your multiple choice answer grid to the booklet. 14. Fill in the gaps in the table below. (Write your answers in your answer booklet, do not write your answers on the exam paper.) [8 marks] Phylum Number of tissue layers Through gut or no through gut Echinodermata a e Arthropoda b f Cnidaria c g Platyhelminths d h 15. List the kingdom, phylum, class, genus and species names of Salmonella enterica. [4 marks] 16. What two features allow whales to remain under water for much longer than other mammals? [2 marks] 17. What is meant by the term ovoviviparous? 18. Name the earliest fossil discovered that demonstrates the evolutionary link between reptiles and birds. 19. What is neoteny? In which vertebrate order does it commonly occur? [2 marks] Section A continues on next page/... TURN OVER

6 6 Section A continued What is coprophagy? Name a group of herbivorous mammals that commonly practice coprophagy. [2 marks] 21. Complete the table saying whether structures are diploid or haploid. (Write your answers in your answer booklet, do not write your answers on the exam paper.) [5 marks] Structure Leaf of Cycas Pollen of Pinus Indusium of Dryopteris Leaf of Taxus Oosphere of Marchantia Haploid or diploid a b c d e END OF SECTION A START YOUR ANSWER TO THE NEXT SECTION IN A NEW BOOKLET Section B begins on next page/...

7 7 SECTION B: ESSAY QUESTION Answer ONE question [30 marks] 22. Molluscs and annelids share many features in their egg and juvenile stages but in the adult forms the features that separate these two phyla can clearly be seen. Discuss this statement. 23. Discuss what is meant by the term life. Describe the evolution of life in the first 2 billion years of the Earth s history. 24. Platyhelmiths and arthropods are at the extreme ends of protostome evolution and complexity. Compare the morphology and physiology of these two phyla. END OF SECTION B START YOUR ANSWER TO THE NEXT SECTION IN A NEW BOOKLET Section C begins on next page/... TURN OVER

8 8 SECTION C: ESSAY QUESTION Answer ONE question [30 marks] 25. Describe the key differences between prokaryotic and eukaryotic cell structures. 26. Describe the diversity seen among extant fish classes citing similarities and differences with other vertebrates. 27. Describe the alternation of generations seen in the land plants. In an illustrated answer, show how this relates to the life cycle of a moss. END OF PAPER

9 UNIVERSITY OF EAST ANGLIA School of Biological Sciences May/June UG Examination BIODIVERSITY BIO-4001A Registration Number SECTION A: Answer Grid (for Multiple Choice Questions only) Place a single cross in the appropriate box Question No. A B C D E Marks given Marks available

10 BIO-4001A EXAMINATION MARKERS [Do not print this when printing to take to Examinations Office! This is for our information only.] Question No. 1 st Marker 2 nd Marker Section A Q1 Harriet Jones Sarah Yeates 21 Section B Q22 Harriet Jones Jon Todd Section B Q23 Harriet Jones Jon Todd Section B Q24 Harriet Jones Jon Todd Section C Q25 Jon Todd Kay Yeoman Section C Q26 Sarah Yeates Harriet Jones Section C Q27 Harriet Jones Sarah Yeates BIO-4001A Module Contact: Dr Harriet Jones, BIO

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