Punjab University 2008-2nd Year B.Sc General Botany - A, : - Question Paper

BOTANY PAPER-A
(Diversity of Seed Plants and their Systematics)

B.Sc. 2nd Year


Time Allowed:3 Hours Maximum Marks:75

Note: Attempt 5 ques. in all, selecting 2 ques. from every of
the Section-I and II. ques. No. one is compulsory. Draw neat and labelled
diagrams, wherever necessary.

1. Answer the subsequent in 3 or 4 lines each:

(i) Seed plants originated on earth in which era?
(ii) What is an index fossil?
(iii) Girdle traces.
(iv) Why has Pinus wood more economic value than that of cycas?
(v) Pycnoxylic wood.
(vi) What is embryosac polymbryony?
(vii) Cyathium inflorescence.
(viii) Marginal placetation.
(ix) Syngenesious.
(x) Pollinium.

SECTION-I

2. (a) Describe the structure of female flower of Williamsonia.
(b) Draw V.S. ovule of Lyginopteris.
(c) Describe briefly the fossilization process.[Marks 3x5=15]

3. Describe the primary structure of Ephedra stem and mode of its
secondary growth.[Marks 15]

4. Write short notes on:

(a) Seed of Pinus.
(b) Unique features of aphedra ovule.
(c) Coralloid roots of cycas.[Marks 3x5=15]

5. Compare the development of male gametophytes of Cycas and Pinus.
Write short notes on Cycas sperm.[Marks 10,5=15]

SECTION-II

6. (a) How will you differentiate the 3-series of sub class polypetalae?
(b) What do you know about primitive and advanced characters?

7. Describe the androecium in the subsequent families:

(a) Ranunculaceae
(b) Gramineae
(c) Liliaceae
(d) Compositae
(e) Rutaceae.[Marks 5x3=15]

8. Distinguish ranging from the following:

(a) Corolla of Liliaceae and Solanaceae.
(b) Inflorescence of Compositae and Fabaceae.
(c) Gynoecium of Ranunculaceae and Brassicaceae.[Marks 3x5=15]

0. Draw floral diagrams of the following:

(a) Coriandrum
(b) Zeuxine
(c) Chenopodium
(d) Citrus
(e) Triticum[Marks 5x3=15]

Earning:   Approval pending.