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Zool 100: General Zoology Question Paper

Zool 100: General Zoology 

Course:Bachelor Of Science

Institution: Egerton University question papers

Exam Year:2013



SECTION A: ANSWER ALL QUESTIONS

1.(a) State four sources of evidence that evolution explains the diversity of life
on earth. (4 Marks)
(b) State four events that have shaped biogeography according to modern evolutionary
biologists. (4 Marks)
2. Describe the following terms: (5 Marks)
i. Aboral
ii. Oral
iii. Cephalic
iv. Proximal
v. Dorsal
3. Using different examples describe the parasitic significance of protozoans. (8 Marks)
4.(a) State three types of sponges. (3 Marks)
(b) List distinguishing characteristics of Phylum Platyhelminthes. (5 Marks)
5.(a) State three phyla that constitute the Aschelminthes. (3 Marks)
(b) Describe the basic parts of a molluscan body. (6 Marks)
(c) Describe briefly the components and functions of the amniotic egg. (5 Marks)
(d) List two evolutionary pressures that affect the amphibians. (2 Marks)
6.(a) Describe the morphological difference between members of class Ophiuroidea
and class Holothuroidea. (1 Marks)

SECTION B: ANSWER ONLY ONE QUESTION

7. Describe the Triploblastic body organization in animals. (20 Marks)
8. Discuss the importance of pheromones in insects. (20 Marks)




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