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NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
NOVEMBER 2018 EXAMINATION

COURSE CODE: BIO307

COURSE TITLE: EVOLUTION

CREDIT: 2 Units

TIME ALLOWED: 2 Hours

INTRUCTION: Answer Question ONE (1) and any other THREE (3) Questions

                               

1a. Enumerate the five major causes of extinction. (5 marks)

 b. Classify mutations on the basis of their functional effects (6 marks)

 c. Give a brief description of the mechanisms for balancing selection. (6 marks)

 d. Write short notes on the following:  

      (i) allopatric speciation (4 marks)

     (ii) peripatric speciation. (4 marks)

 

2a. Define the term classification (2 marks)

  b. List any four probable stages involved in the origin of life. (4 marks)

  c. Outline the techniques that can be used to investigate polymorphism. (9 marks)

 

3. Adaptation, speciation and hybrid gender are very important in Evolution- Discuss with reference to their outcomes (15 marks; 5 for each)

 

4a. Outline the harmful mutations. (7 marks)

 b. Write short notes on the following evidences of evolution:  

      i. Biochemical (4 marks)

     ii. Anatomical (4 marks)

 

5a. Outline the key evolutionary innovations that can be used to trace evolution in the Plant kingdom. (3 marks)

  b. Analyze the concept of mutation in relation to Molecular Biology and Genetics (12 marks)


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