BOT/V/CC/09 Student's Copy
2 0 1 8
CBCS
5th Semester
BOTANY
FIFTH PAPER
Fungi, Plant Pathology, Biostatistics
Full Marks 75
Time 3 hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 10
Tick the correct answer in the brackets provided 1×10=10
1. Perfect state spore is absent in
deuteromycotina
ascomycotina
mastigomycotina
basidiomycotina
2. Fungi are always
parasitic
saprophytic
heterotrophic
autotrophic
3. The antibiotic drug penicillin was obtained from
Penicillium notatum
Penicillium javanicum
Penicillium divaricatum
Collectotrichum falcatum
/142 1 Contd.
4. Parasexuality was first discovered by
Alexander Fleming
E. J. Butler
Alexopoulos and Ainsworth
Pontecorvo and Roper
5. Formation of tyloses in plant is a
physical defense mechanism
chemical defense mechanism
biological defense mechanism
biochemical defense mechanism
6. Fungal hyphae penetrate hard cell wall of their host with the help of
enzymes
hormones
haustoria
sharp tips
7. The causal organism of late blight of potato is
Puccinia-triticina
Phytophthora infestans
Alternaria solani
Puccinia graminis
8. The famous Irish famine is due to
rusts of wheat
early blight of potato
late blight of potato
citrus canker
9. The most frequent occurring observation in the data is called
mean
median
mode
standard deviation
BOT/V/CC/09/142 2 Contd.
10. The positive square root of the mean of the squared deviations of some
observations from their arithmetic mean is called
standard deviation
variation
median
mode
SECTION—B
Marks 15
Write short notes on the following 3×5=15
1. Zoospores
OR
Ascospores
2. Modes of nutrition in fungi
OR
Obligate parasites
3. Penetration
OR
Passive dispersal or dissemination of pathogen
4. Disease cycle of loose smut of wheat
OR
Control measures of wheat rust
5. Arithmetic mean
OR
Standard error
PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
1. Give a detailed comparative account on the structure, reproduction and life
cycle of zygomycotina and deuteromycotina. 10
BOT/V/CC/09/142 3 Contd.
OR
2. Write brief notes on any two of the following 5×2=10
Ainsworth's system of classification of fungi
Types of fungal spores
Active liberation of fungal spores
3. Write a comprehensive note on the various modes of nutrition in fungi. 10
OR
4. Describe any two of the following 5×2=10
Evolutionary trends in fungi
Heterothallism
Economic importance of fungi
5. Define infection. Explain the different types of host-pathogen interaction.
2+8=10
OR
6. Write short notes on any two of the following 5×2=10
Scope of plant pathogen
Biological control of plant disease
Physical defense mechanism
7. Describe the symptoms, disease cycle and control measures of early blight
of potatoes. 10
OR
8. Briefly describe the symptoms of any two of the following 5×2=10
Red rot of sugarcane
Citrus canker
Downy mildew of crucifers
9. Find whether or not the following observed distribution of phenotypes in a
sample of 384 Drosophila flies have a significant goodness of fit with
proposed Mendelian 9 3 3 1 distribution. The value of chi-square at
level for 3 degrees of freedom is 7·815 10
Phenotypes AB Ab aB ab Total
No. of individuals 232 76 58 18 384
OR
10. Write short notes on any two of the following 5×2=10
Median
Standard deviation
Correlation