M.Sc. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2017.
Third Semester
Botany
Paper III PLANT DEVELOPMENT AND REPRODUCTION
2 21133-AA
Time 3 Hours Max. Marks 70
SECTION — A
Answer any FIVE questions. 6 30 Marks)
1. Shoot apical meristem.
2. Root hairs.
3. Senescence.
4. Abscission.
5. Microspore tetrads.
6. Embryosac haustoria.
7. Apomixis.
8. Vectors.
SECTION — B
Answer ALL questions. 10 40 Marks)
9. Describe the anomalous secondary growth in a dicot stem.
Or
Give an account of anatomy of modified leaves.
10. Describe the structure and development of fruit wall.
Or
Enumerate the salient features of programmed cell death.

11. Describe the various types of embryo sacs studied by you.
Or
Write an essay on anther tapetum.
12. Describe the genetic basis of incompatibility.
Or
Describe the cytology of endosperm.