LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – ADVANCED ZOOLOGY & BIOTECHNOLOGY

IB 2

SECOND SEMESTER – APRIL 2006

                                             PB 2100 – ESSENTIALS OF PLANT BIOLOGY

(Also equivalent to PB 3100)

 

 

Date & Time : 26-04-2006/1.00-4.00 P.M.   Dept. No.                                                       Max. : 100 Marks

 

 

Part A

Answer all the questions                                                                                (20 marks)

Choose the best answer                                                                                  (5×1=5)

 

1. Which of the following is not a spore present in Puccinia:
2. a) ascospore b) basidiospore            c) teliospore      d)  aeciospore

 

2. Identify the wrong statement
3. a) Natural system of classification does not attempt at bringing out phylogenetic

relationship.

1. b) Bicarpellatae has 4 orders and 24 families.
2. c) Present system of naming of plants is known as binomial system of

nomenclature.

1. d) 6 orders and 14 families are included under the series heteromerae.

 

3. Statement 1 : Parenchyma is made up of thin walled cells.

Statement 2 :  Parenchyma is a complex permanent tissue.

1. Statement 1is correct, but statement 2 is incorrect
2. Statement 2 is correct, but statement 1 is incorrect
3. Both statements 1 and 2 are correct.
4. Both statements 1 and 2 are incorrect.

 

4. When micropyle and chalaza lie in one line and the funicle lies parallel to it, the ovule is:
5. a) orthotropous                                        b) anatropous
6. c) campylotropous                           d) circinotropous

 

5. Vincristin and vinblastin are obtained from
6. a) Papaver somniferum                            b) Eugenia caryophyllata
7. c) Catharanthes roseus                            d) Lycopersicum esculenthem

 

 

II State whether the following are true  or false                                             (5×1=5)

 

6. Marsilea is an aquatic fern, included under gymnosperms.
7. Salvia is a member of family Labiatae with bilipped corolla.
8. In dicot leaves, undifferentiated mesophyll tissue is present.
9. PolIen grain is the first cell of the male gametophyte.
10. The alkaloids, morphine and codein are obtained from the capsules of

Cannabis sativa

 

III  Complete the following                                                                (5x 1= 5)

 

11. ————- roots in Cycas show the presence of algal zone.
12. In taxonomic hierarchy each unit of classification is referred to as a —————–

 

13. Vascular bundles in dicot stem are said to be ————-since the xylem and

phloem are arranged in the same radius.

14. When the pollen tube enters the ovule through the integuments, it is called———.
15. Quinine is extracted from the bark of ————–.

 

1. Answer the following each in about 50 words. (5×1=5)

 

16. What is hormogonium?
17. What is citation of author?
18. Distinguish between exarch and endarch conditions.
19. Write a short note on the post – fertilisation changes.
20. Give the binomial of any two timber yielding plants.

 

PART  B

 

Answer any five of the following, each  in about  350 words. Draw diagrams / flowcharts wherever necessary                                                                 (5×8=40)

 

21. Describe asexual reproduction in
22. Give an account of artificial system of classification of plants.
23. Mention the characteristic features of the family Amaranthaceae.
24. Discuss normal secondary thickening in dicot stem.
25. Write about simple permanent tissues.
26. Briefly describe the process of formation of microspores from microspore mother

cells.

27. Mention the scientific name , family, parts used and uses of the following plants:

Geranium, sandal, clove and hemp.

28. Bring out the economic importance of any two each of condiments and fibre

yielding plants.

PART  C

 

Answer the following questions, each in about 1500 words.  Draw diagrams and flowcharts wherever necessary.                                                            (2x 20=40)

 

29 a) What is isomorphic alternation of generations?  Discuss this with regard to the

life cycle of Ectocarpus.

(OR)

1. b) Give a comparative account of the anatomy of dicot and monocot root.

 

30 a) Describe the characteristics features of the family Lamiaceae. Mention the

binomial and economic importance of any six plant species.

(OR)

1. b) Describe the structure and development of dicot embryo.

 

 

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