LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

IB 41

THIRD SEMESTER – APRIL 2007

PB 3502 – ANGIO. TAXONOMY & EMBRYOLOGY

 

 

 

Date & Time: 21/04/2007 / 1:00 – 4:00 Dept. No.                                                Max. : 100 Marks

 

 

   PART – A                                    (20 marks)

 

Answer all the questions.

I  Choose the best answer                                                                   (5 x 1 = 5)

 

1.Attributes correspond to

1. Characters b. Genus c. Species                    d. Taxon

 

2. Find the odd one out
3. Ixora b. Catharanthus c. Datura         d. Phyllanthus

 

3.The morphological nature of the edible part in apple is

1. pericarp b. receptacle    c. mesocarp     d. endocarp

 

4. Pollination taking place between two flowers borne by two separate plants of the same

species is known as …..

1. Geitonogamy              b. Xenogamy        c. Homogamy        Cleistogamy

 

5. A pollen is best defined as a
6. male gamete                           b. microspore mother cell
7. partially developed embryo    d. partially developed male gametophyte

 

II State whether the following statements are true or false.                           (5 x 1 = 5)

 

6. Archechlamydeae refers to polypetalous nature.
7. Aloe vera belongs to the family Poaceae.
8. Eucalyptus oil is employed in the floatation process for the separation of minerals

from their ores.

9. Double fertilization means the fusion of one male gamete with the egg and the other

with secondary nucleus.

10. In anatropus ovule the micropyle and chalaza are in straight line with funicle.

 

III  Complete the following.                                                               (5 x 1 = 5)

 

11. Anthers arranged in two different sizes in a flower is called as ————–.
12. Dioecious, tricarpellary, superior ovary are characteristic to the family ————.
13. The oil derived from the waste of the bark peeling process of ——————– is

used as a carminative and astringent.

14. When the gynoecium matures earlier than the anthers, the condition is ————-.
15. The process by which seedless fruits are produced is known as ———————.

 

 

 

 

 

IV Answer the following, each within 50 words.                                          (5 x 1 = 5)

 

16. Write short notes on Cryptogamia
17. What are polygamous flowers?
18. Distinguish between spices and condiments.
19. What is pollen kitt ?
20. Differentiate chalazogamy from mesogamy.

 

PART – B

 

Answer any FIVE of the following, each not exceeding 350 words. Draw diagrams and flow charts wherever necessary.                                                                    (5 x 8 = 40)

 

21. Explain the classification of dicots by Bentham and Hooker.
22. Bring out the salient features of the family Cucurbitaceae.
23. Describe the inflorescence in Euphorbiaceae.
24. Explain the economic importance of any 2 cereals and 2 millets.
25. Write the botanical name, family, morphology of useful parts and uses of cotton,

jute, sandal and pepper.

26. Give an illustrated account of development of microsporangium.
27. What is an endosperm? Describe the development of Nuclear endosperm.
28. Briefly explain the conditions that promote cross pollination.

 

PART – C

 

Answer the following, each not exceeding 1500 words.                               (2 x 20 = 40)

 

1. (a) With suitable examples explain how biomolecules are useful in

biosystematics?

 

Or

(b) Compare the floral characters of Rubiaceae, Apocyanaceae and Solanaceae in

a tabular column.

 

30 (a) Describe the structure and development of Polygonum type of embryosac.

State how it is different from Allium and Peperomia types.

Or

 

(b) Describe the development of a typical monocot embryo.

 

 

 

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