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Aas 3121: Zoology Question Paper

Aas 3121: Zoology

Course:Bachelor Of Science In Agricultural Extension And Education

Institution: Jaramogi Oginga Odinga University Of Science And Technology question papers

Exam Year:2013

JARAMOGI OGINGA ODINGA UNIVERSITY OF SCIENCE AND TECHNOLOGY
SCHOOL OF AGRICULTURAL AND FOOD SCIENCES
FIRST YEAR SECOND SEMESTER EXAMINATIONS FOR THE DEGREE OF
BACHELOROF SCIENCE IN AGRICULTURAL EXTENSION AND EDUCATION –
2013/2014 ACADEMIC YEAR
AAS 3121: ZOOLOGY
Instructions:

1. This paper consists of TWO sections, A and B.
2. Answer ALL questions from section A and any TWO from section B.
3. Write all answers in the booklet provided.

SECTION A [30 MARKS]

Answer ALL questions.

1. (a) Outline three unifying characteristics of class Mammalia. [3marks]
(b) Give three characteristics of mammals in Subclass Prototheria (monotremes). [3marks]
(c) Briefly describe the breathing process in mammals.[3marks]
(d) Distinguish between endothermy and ectothermy. [3marks]

2. (a) Describe three characteristics of modern birds. [3marks]
(b) Give the various adaptations of birds for flight. [3marks]
(c) Briefly describe how birds maintain their feathers. [3marks]

3. (a) Give the two ‘lifestyles’ found in amphibians. [3marks]
(b) Explain the meaning of ‘amniote egg’ [3marks]
(c) Explain the significance of low resting metabolism in reptiles. [3marks]

SECTION B [40 MARKS]

Answer ANY TWO questions.

4. Describe the general characteristics of fish in the class Osteichthyes. [20marks]

5. Describe amphibians under the following headings:
(a) Circulatory system (both juvenile and adult stage). [10marks]
(b) Digestive system. [10marks]

6. (a) Describe the relationship that exists between humans and birds. [10marks]
(b) Describe economic importance of birds to humans.[10marks]

7. Discuss characteristics of Class Reptilia under the following headings:
(a) Defence mechanism [8marks]
(b) Reproduction [8marks]
(c) Shedding and regeneration of tail [4marks]

Aas 3121: Zoology Question Paper

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