M.Sc. DEGREE EXAMINATION, APRIL 2018
Second Semester
Botany
Elective — WOOD SCIENCE
(CBCS 2017 onwards)
Time 3 Hours Maximum 75 Marks
Section A (10 X 2 20)
Answer all questions.
1. Vascular cambium
2. Wood parenchyma
3. Histochemistry
4. Fusiform initial
5. Hemicellulose
6. Polysaccharides
7. Dendrochronology
8. Growth rings
9. Wood density
10. Stone ground wood.
Sub. Code
7MBO2E4
AFS-0604
2
WSS
Section B X 5 25)
Answer all questions, choosing either or
11. Explain in detail the evolution of wood.
Or
Comment on 'formation of wood cells'.
12. Explain the composition of vascular cambium with
neat diagrams.
Or
Describe the structure and histochemistry of
fusiform and Ray initials.
13. Write notes on composition and cell types of wood.
Or
Discuss in brief on chemistry of cell wall.
14. Differentiate between early and late wood.
Or
Describe the theories related with wood transitions.
15. Write notes on timber species found in South India.
Or
Mention the plant species used as fuel wood.
Section C X 10 30)
Answer any three questions.
16. Explain in detail on origin of vascular cambium in
different plants.
17. Explain in detail on seasonal and cytological changes in
cambial activity.
AFS-0604
3
WSS
18. Discuss on the wood composition and distribution
variation in detail.
19. Give detailed notes on reaction, compression and tension
woods.
20. Write detailed notes on the economic importance of wood.
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