MS – 287

*MS287*

IV Semester B.Sc. Examination, May/June 2014 (NS) (Semester Scheme) (2012-13 and Onwards) BOTANY (Paper – IV) Gymnosperms and Embryology of Angiosperms Time : 3 Hours

Max. Marks : 70

Instructions : 1) Answer all Parts. 2) Draw labelled diagrams wherever necessary. PART – A A. Answer any seven of the following in 2-3 sentences each.

(7×2=14)

1) What is Ruminate endosperm ? 2) Draw a neat labelled diagram of ‘male flower’ of Gnetum. 3) What is Amoeboid tapetum ? 4) What is pavement tissue ? 5) What is palynology ? Mention one application of palynology. 6) Define Totipotency. 7) What is Amphitropous ovule ? 8) Differentiate porogamy from misogamy. 9) What is trifoliar spur ? PART – B B. Write short notes on any six of the following.

(6×4=24)

10) Male cone of Pinus. 11) Nemec phenomenon. 12) Fritillaria type of embryosac development. 13) Structure of pollen wall. 14) P. Maheswari. P.T.O.

MS – 287

-2-

*MS287*

15) Anatomy of coralloid root of cycas. 16) Steps involved in tissue culture technique. 17) Nutrient media. PART – C C. Give a detailed account of any four of the following.

(8×4=32)

18) Describe the reproductive structures of cycas. 19) Describe the development of Anther and structure of mature Anther in Angiosperms. 20) What is double fertilization ? Explain the process. 21) Describe the Anatomy of Gnetum leaf. List out Angiosperm characters found in Gnetum. 22) Describe the structure of 7-celled embryosac. Add a note on the role of synergids in fertilization. 23) Write an explanatory note on embryogeny in Capsella.

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MS – 287

*MS287*

IV Semester B.Sc. Examination, May/June 2014 (Semester Scheme) (OS) (Prior to 2012-13) BOTANY (Paper – IV) Gymnosperms and Embryology of Angiosperms Time : 3 Hours

Max. Marks : 60

Instructions : 1) Answer all Parts. 2) Draw labelled diagrams wherever necessary. PART – A A. Answer any six of the following in 2-3 sentences each :

(6×2=12)

1) What is periplasmodium type of tapetum ? 2) Define polyspermy ? 3) What is pavement tissue ? Where is it present ? 4) What is Triple fusion ? 5) Write any two practical applications of tissue culture. 6) Differentiate between bract scale and an ovuliferous scale in Pinus. 7) Mention any four causes of Polyembryony. 8) What is pollen embryo sac ? PART – B B. Describe any six of the following : 9) T.S. of Pinus needle. 10) Somatic hybridization. 11) T.S. of stem of Gnetum. 12) Monocot Embryo. 13) Polygonum type of Embryo sac.

(6×4=24)

MS – 287

-4-

*MS287*

14) Embryology in relation to taxonomy with respect to Exocarpus. 15) Endosperm haustorium of Grevillea. 16) Palynogram. PART – C C. Give a detailed account on any three of the following : 17) The structure and development of an anther in Angiosperms. 18) Polyembryony. 19) Ovules in angiosperms. 20) Male and female cones of Gnetum. 21) What is Apomixis ? Classify and explain with suitable examples. ______________

(3×8=24)