Zoology 101 Past Paper PDF - CHUKA University - Dec 2018

ZOOL 101 CHUKA UNIVERSITY UNIVERSITY EXAMINATIONS EXAMINATION FOR THE AWARD OF DEGREE OF BACHELOR OF SCIENCE AND BACHELOR OF EDUCATION (SCIENCE) ZOOL 101: LOWER INVERTEBRATES STREAMS: B...

ZOOL 101 CHUKA UNIVERSITY UNIVERSITY EXAMINATIONS EXAMINATION FOR THE AWARD OF DEGREE OF BACHELOR OF SCIENCE AND BACHELOR OF EDUCATION (SCIENCE) ZOOL 101: LOWER INVERTEBRATES STREAMS: BSC,BED(SC) Y1S1 TIME: 2 HOURS DAY/DATE: THURSDAY 13/12/2018 2.30 P.M -4.30 P.M INSSTRUCTIONS:  Answer all questions in section A and any other two in section B  Do not write anything on the question paper SECTION A (30 MARKS) 1. Distinguish between phyla Cnidaria and Ctenophora. [5 marks] 2. Outline five characteristics of nematodes. [5 marks] 3. Describe five types of cells found in sponges. [5 marks] 4. Explain briefly the feeding mechanism in protozoa. [5 marks] 5. Citing examples of organisms, state the functions of the following structures: [5 marks] (a) Contractile vocuole (b) Corona (c) Flame cell (d) Cysts (e) Nematocyst 6. Use a diagram to illustrate the structure of Acanthocephala. [5 marks] Page 1 of 2  ZOOL 101 SECTION B (40 MARKS) 7. (a) Explain the mechanism of reproduction in sponges. [14 marks] (b) Describe the mechanism of support in poriferans. [6 mark] 8. (a) Explain dimorphism in cnidarians. [4 marks] (b) Describe the classification of phylum Cnidaria giving examples where appropriate. [16 marks] 9. (a) Discuss the features that indicate evolutionary advancement of roundworms over flatworms. [8 marks] (b) Describe the classification of phylum Platyhelminthes. [12 marks] -------------------------------------------------------------------------------------------------------------------- Page 2 of 2