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Pbiol 021: Basic Biology Ii Question Paper

Pbiol 021: Basic Biology Ii

Course:Pre-University Programme (Pre-University)

Institution: Kabarak University question papers

Exam Year:2012

KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2012 ACADEMIC YEAR
FOR THE CERTIFICATE OF PRE-UNIVERSITY BIOLOGY
PBIOL 021: BASIC BIOLOGY II
DAY: WEDNESDAY DATE: 21/03/ 2012
TIME: 2.00 – 4.00 P.M. STREAM: SEM 2
INSTRUCTIONS:

Answer ALL the questions in Section A and any TWO in Section B.

SECTION A: (40 Marks)

1. (a) Write short notes about the following terms: (6 mks)
I. Pancrease
II. Homeostasis
III. Nutrition
IV. Interstitial fluid
V. Gastrovascular cavity
VI. Respiratory surfaces

(b) Differentiate between the following terms: (4 mks)
I. Single and double circulation
II. Open and closed circulation

2. (a) Why was it necessary for transport systems to evolve in animals? (4 mks)
(b) List the components of blood and describe the function of each in relation to
transport in animals. (6 mks)

3. (a) What are the functions of a circulatory system? (6 mks)
(b) What properties should a respiratory surface have? (4 mks)

4. Describe the various mechanisms that have evolved in different groups of animals
for elimination of waste products of metabolism. (10 mks)

SECTION B: (30 Marks)
5. Describe the various mechanisms used by different groups of animals for regulation of
body temperature. (15 mks)

6. Compare the advantages and disadvantages of gas exchange in air with those of gas
exchange in water. (15 mks)

7. Define osmoregulation and excretion and contrast the advantages and disadvantages

of excreting ammonia, uric acid or urea. (15 mks)

Pbiol 021: Basic Biology Ii Question Paper

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