DISTANCE EDUCATION
M.Sc. (Botany) (Specialization Plant Biotechnology) DEGREE
EXAMINATION, MAY 2018.
PLANT DIVERSITY
(2008 Onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
Each question carries 20 marks.
x 20 100)
1. Explain thallius construction in Class:
Chlorophyceae giving suitable examples.
Write a brief note on vegetative reproduction in
algae.
Define: Mariculture. Add a note on its significance.

2. Write down Alexopoulos and Mims (1979) system of
classification of Fungi.
Explain the types of fructifications formed in Class
Ascomycetes and Basidiomycetes.
Schematically represent the life cycle patterns in
fungi.
Sub. Code
11
DE-4075
2
Sp 1
3. 'Lichen is a dual organism'- Justify. Explain the
structure of a heteromerous lichen thallus.
Explain reproduction in lichens.
Classify lichens based on their habitat and thallus
forms.
4. Trace the structural variations of sporophytes in
Marchantiales, Anthocerotales and Sphagnales.
On what basis will you assign the gametophytes of
bryophytes to their respective order?
Outline Watson (1964) system of classification of
Bryophytes.
5. Enlist the salient characteristics of Pteridophytes
belonging to various classes.
Give an account of life cycle patterns in
Pteridophytes.
Define' fossils'. Add a note on fossil pteridophytes
giving examples.
6. Enlist the features of differences and resemblances
between Gymnosperms and Pteridophyes.
Compare the characteristics of Cycad ales,
Coniferales and Gnetales.
Give an account of fossil Gymnosperms.
7. Outline the classification of Gymnosperms
according to Sporne (1967).
Give an account of strobili in Pteridophytes.
How are the Bryophytes adapted to land
environment?
DE-4075
3
Sp 1
Explain the types of asexual spores in fungi.
Elaborate on thallus organization and spore
dispersal mechanisms in Fungi.
Write about the culture of microalgae.