M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
First Semester
Botany
PLANT DIVERSITY — I
(PHYCOLOGY, MYCOLOGY, LICHENOLOGY AND
BRYOLOGY)
(CBCS 2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. What are pyrenoids?
2. Define heterocysts. What are its functions?
3. Comment on agar-agar.
4. Define Coenobium.
5. What is heterothallism?
6. Define predacious fungi.
7. What is bioindicators?
8. Define Soredia.
9. Mention any two fossil bryophytes.
10. Write the difference between liverworts and hornworts.
Sub. Code
525101
RW-865
2
WSS
Part B x 5 25)
Answer all questions, choosing either or
11. Write about the range of thallus structures found in
algae.
Or
What is alternation of generation? Cite one example
where this phenomenon is found?
12. Describe the reproductive patterns in Rhodophyceae.
Or
Write an essay on the economic importance of
Algae.
13. Write the salient feature of Deuteromycotina.
Or
Briefly explain heterothallism and parasexuality in
fungi.
14. Describe the biological relationship of phycobionts
and mycobionts.
Or
Enumerate the economic importance of the Lichens.
15. Describe the life cycle patterns of Anthoceros.
Or
Describe the economic importance of bryophytes.
RW-865
3
WSS
Part C x 10 30)
Answer any three of the following.
16. Write a detailed essay on the types of reproduction in
algae.
17. Describe elaborately the lire cycle pattern in
Xanthophyceae.
18. Write a detailed essay on the fruit bodies found in fungi.
19. Describe how lichens serve as indicators of pollution?
20. Write an essay on the fossilized bryophytes and their
significance.
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