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Biol 225: Evolutionary Biology Question Paper

Biol 225: Evolutionary Biology

Course:Pure And Applied Sciences

Institution: Kenya Methodist University question papers

Exam Year:2013

KENYA METHODIST UNIVERSITY
END OF 3RDTRIMESTER 2013 (DAY) EXAMINATION
FACULTY : SCIENCE & TECHNOLOGY
DEPARTMENT : PURE AND APPLIED SCIENCES
UNIT CODE : BIOL 225
UNIT TITLE : EVOLUTIONARY BIOLOGY
TIME : 2 HOURS

INSTRUCTIONS
Section A: Answer all the questions
Section B: Answer any two questions
SECTION A: 30 MARKS
Question One
Explain why the perception that microbes adapt to antibiotics is wrong
(3 marks)
Describe the contributions and behavior of somatoplasm as proposed by Weismann in his theory of continuity of germplasm
(3 marks)
Variation is the rule in nature. Briefly describe the main types of variations common among individuals of the same species
(4 Marks)
Question Two
What do you understand by the term speciation?
(2 Marks)
Distinguish between allopatric and sympatric speciation
(4 Marks)
Distinguish between hybrid sterility and non-viable hybrid as post mating reproductive barriers and give an example in each case
(4 marks)
Question Three
Distinguish between the following terms as used in evolutionary biology
(4 Marks)
Divergent evolution and convergent evolution
Adaptation and hereditary
State and describe structures that arise from the following types of evolution and cite specific examples
(6 Marks)
Convergent evolution
Divergent evolution
SECTION B: 40 MARKS
Answer any two questions
Question Four
Using a specific example, discuss how adaptive radiation results into speciation
(10 marks)
Explain spontaneous generation as a theory of the origin of life and how its disapproval
(5 marks)
With reference to the English moth (bistonbetularia) explain how natural selection occurs
(5 marks)
Question Five
Explain the major factors on which Charles Darwin’s theory of natural selection was based
(10 marks)
Describe five factors that bring about changes in a populations gene pool
(10 marks)
Question Six
Explain the various types of isolating mechanisms that led to the emergence of new species.
(12 Marks)
Describe how ’colonization’ and ’vicariance’ lead into isolation of organisms
(8 marks)

Biol 225: Evolutionary Biology Question Paper

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