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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 3''RD ''TRIMESTER 2012 (DAY) EXAMINATIONS
FACULTY : SCIENCE & TECHNOLOGY
DEPARTMENT : PURE & APPLIED SCIENCES
UNIT CODE : BIOL 225
UNIT TITLE : EVOLUTIONARY BIOLOGY
TIME : 2 HOURS

Instructions: Answer ALL Questions in Section A and any TWO Questions in Section B.
SECTION A
Question One
Explain why the perception that microbes adapt to antibiotics is wrong.
Contrast the contributions and behavior of somtoplasm 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 among individuals of a 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.
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
Question Four
Citing specific examples, discuss how adaptive radiation results into speciation.
(10 Marks)

Explain spontaneous generation as a theory explaining the origin of life and how it was disproved.
(5 Marks)

With reference to the English moth (Biston betularia) explain how natural selection occurs.
(5 Marks0
Question Five
Explain the major factors on which Charles Darwin’s theory of natural selection is based.
(10 Marks)
Describe FIVE factors that bring about changes in a population’s 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 "Colonizatin" and "Vicariance" lead into isolation of organisms.
(8 Marks)

Biol 225: Evolutionary Biology Question Paper

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