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Zool 210:Invertebrate Zoology November 2008 Question Paper

Zool 210:Invertebrate Zoology November 2008

Course:Bachelor Of Education Science

Institution: Kabarak University question papers

Exam Year:2009

KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2008/2009 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF EDUCATION
SCIENCE
COURSE CODE: ZOOL 210

INSTRUCTIONS TO CANDIDATES:
Answer ALL Questions in Section A and any TWO in Section B

SECTION A: (40 marks)
1. (a) Write explanatory notes on the following;
i. Mesonglea (2 marks)
ii. Mastax (2 marks)
(b) Distinguish between:
i. Cnidocytes and choanocytes
ii. Asconoids and leuconoids
iii. Medusa and polyp (6 marks)

2. (a) State two modes of feeding in rotifers and describe how rotifers are adapted to these
feeding modes (4 marks)
(b) Describe invertebrate adaptations to a parasitic mode of life (4 marks)

3. (a) Cephalopods show great evolutionary advance relative to other invertebrates. Give
evidence (2 marks)
(b) State Four (4) diagnostic features of phylum mollusca (2 marks)

4. (a) Describe the physiological significance of the integument in flukes (4 marks)
(b) Explain how possession of wings by insects has contributed to their success (4 marks)

5. (a) state 2 principle characteristics that show evolutionary advance of the following;-
i. radiates over sponges (2 marks)
ii. flatworms over radiates (2 marks)
(b) State 3 factors that suggest a common origin for the following invertebrates;-
iii. Ctenophores and cnidarians (3 marks)
iv. Arthropods and annelids (3 marks)

SECTION A: (30 marks)
6. Discuss locomotion in protozoans (15 marks)

7. Describe with aid of labeled diagrams the nervous and circulatory systems in annelids
(15 marks)

8. Describe with the use of well labeled diagrams where appropriate, the significance of
embroyology in the taxonomy of invertebrates (15 marks)

Zool 210:Invertebrate Zoology November 2008 Question Paper

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