Biol 225: Evolutionary Biology Question Paper
Biol 225: Evolutionary Biology
Course:Education
Institution: Kenya Methodist University question papers
Exam Year:2013
KENYA METHODIST UNIVERSITY
END OF 3RDTRIMESTER 2013 (SB) EXAMINATION
FACULTY : EDUCATION AND SOCIAL SCIENCES
DEPARTMENT : EDUCATION
UNIT CODE : BIOL 225
UNIT TITLE : EVOLUTIONARY BIOLOGY
TIME : 2 HOURS
INSTRUCTIONS
Section A: Answer all questions
Section B: answer any two questions
SECTION A
Question One
Distinguish between the following terms as used in evolutionary biology
Convergent evolution and coevolution evolution
(2 Marks)
Camouflage patterns and cryptic patterns
(4 marks)
Hybrid sterility and non-viable hybrid
(4 marks)
Question Two
Explain structures that arise from the divergent evolution and describe two specific examples
(4 marks)
Explain the four types of variations common among individuals of a species
(4 marks)
Contrast the contributions and behaviors of somatoplasm as proposed by Weismann in his theory of continuity of germplasm
(2 Marks)
Question Three
Define altruism and with an example explain how it enhances survival of a species
(4 marks)
Explain how reproductive isolation leads in emergence of new species
(3 marks)
Describe three processes that increase genetic variation among living organisms
(3 Marks)
SECTION B: 40 MARKS
Question Four
Citing specific examples discuss how adaptive ration results into speciation
(10 marks)
Discuss prezygotic barriers that prevent sexual reproduction
(10 marks)
Question five
Describe how colonization and vicariance lead into isolation of organisms
(10 Marks)
Explain the postulations of Lamarck’s theory of inheritance of acquired characters
(10 marks)
Question Six
Graphically illustrate directional selection and discuss two specific examples.
(10 marks)
With reference to a specific example explain how natural selection occurs
(10 marks)
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