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Biol 225: Evolutionary Biology Question Paper

Biol 225: Evolutionary Biology

Course:Education

Institution: Kenya Methodist University question papers

Exam Year:2012

KENYA METHODIST UNIVERSITY
END OF 1''st ''TRIMESTER 2012 (SCHOOL BASED) EXAMINATIONS
FACULTY : EDUCATION AND SOCIAL SCIENCES
DEPARTMENT : EDUCATION
UNIT CODE : BIOL 225
UNIT TITLE : EVOLUTIONARY BIOLOGY
TIME : 2 HOURS

Instructions: Answer ALL the Questions in Section A and any other TWO Questions in Section B.
SECTION A: (20 MARKS)
Question One
Briefly discuss why the study of evolutionary biology is important.
(2 Marks)
State and briefly explain TWO theories that explain the origin of universe.
(2 Marks)
Question Two
Give brief explanations on the following:
Organic/chemical evolution.
(2 Marks)
Punctuated equilibrium theory.
(2 Marks)
Stabilizing selection.
(2 Marks)
Disruptive selection.
(2 Marks)
Question Three
Distinguish between the following giving relevant examples in each case.
Homologous structures and analogous structures.
(4 Marks)
Macro-evolution and Micro-evolution.
(4 Marks)
SECTION B (40 MARKS)
Question One
Define what is meant by the term speciation.
(2 Marks)
Discuss any FIVE isolating mechanisms that lead to speciation.
(18 Marks)
Question Two
Discuss Lamarck’s theory of organic evolution highlighting aspects of his theory that have been falsified.
(10 Marks)

Discuss George Curier’s theory of catastrophism.
(10 Marks)
Question Three
(a) Define the term variation in relation to evolutionary biology. (2 Marks)

(b) Discuss FOUR types of variation in a population. (8 Marks)
(c) There are FIVE main causes/agents of change in populations according to Hardy-Weinbergs principles of genetic equilibrium. Discuss. (10 Marks)

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