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NATIONAL OPEN UNIVERSITY OF NIGERIA
UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JULY 2017 EXAMINATION
COURSE CODE: BIO 311
COURSE TITLE: MYCOLOGY
TIME ALLOWED: 2 HOURS
INSTRUCTION: ANSWER QUESTION 1 AND ANY OTHER THREE QUESTIONS
- a. Discuss five criteria commonly used in the primitive classification of fungi highlighting their advantages and disadvantages. 10 marks
b. Differentiate between asexual and sexual reproduction in fungi.
3 marks
c. Discuss any three types of the following:
(i) Asexual spores 6 marks
(ii) Sexual spores 6 marks
- (a). Give the distinguishing characters of the different classes of fungi shown in the table below and give an example in each case.
|
Fungi Class |
Distinguishing Characters |
Example |
|
Chytridiocetes |
|
|
|
Oomycetes |
|
|
|
Zygomycetes |
|
|
|
Ascomycetes |
|
|
|
Basidiomycetes |
|
|
|
Deuteromycetes |
|
|
|
Yeast |
|
|
11 marks
(b). Distinguish between lower and higher fungi. 4 marks
- (a). Explain with an example how the nomenclature of fungi is binomial.
4 marks
(b). Give the standard name endings for the following taxa of fungi:
6 marks
Divisions:
Subdivisions:
Classes:
Sub-classes:
Order:
Family:
(c). How are systemic mycoses acquired? Give three examples each of the two groups of systemic mycoses. 5 marks
- (a). Briefly describe wine production 7 marks
(b). Discuss the discovery of antibiotics 5 marks
(c.). What is blastomycosis and which organism causes it? 3 marks
- (a). Distinguish very clearly between superficial and subcutaneous mycoses.
5 marks
(b). Give three examples each for superficial and subcutaneous mycoses.
6 marks
(c). Discuss briefly any one of the examples of subcutaneous mycoses.
4 marks
