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Pbiol 021: Basic Biology Ii Question Paper

Pbiol 021: Basic Biology Ii

Course:Certificate Of Pre-University Biology

Institution: Kabarak University question papers

Exam Year:2010

COURSE CODE: PBIOL 021

COURSE TITLE: BASIC BIOLOGY II

STREAM: SEMESTER TWO

DAY: FRIDAY

TIME: 2.00 – 4.00 P.M.

DATE: 10/12/2010

INSTRUCTIONS:
Answer ALL questions in SECTION A and ANY TWO from SECTION B

SECTION A (40MARKS)

1. Giving examples define the following terms (8 marks)

a) Carrying capacity
b) Ultra filtration
c) Negative feedback mechanism
d) Counter flow system

2. a) Explain briefly what digestion is? (2 marks)
b) Explain what happens to food material in the following parts of the digestive
system.

i) Mouth (3 marks)
ii) Duodenum (3 marks)

3. Explain how the body mechanisms work to:-
a) Reduce blood sugar level (4 marks)
b) Decrease body temperature (4 marks)

4. Describe the events which take place during expiration in a mammal (8 marks)

5. a) What do you understand by the term double circulation (2 marks)
c) Describe the circulation in a mammalian heart (6 marks)

SECTION B (30MARKS)

6. Discuss the biotic factors that influence distribution of organisms (15 Marks)

7. Write an essay on the respiratory structures of amphibians (15 marks)

8. Describe gametogenesis in mammals. (15 marks)

Pbiol 021: Basic Biology Ii Question Paper

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