LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & BIOTECHNOLOGY

AE 01

FIRST SEMESTER – NOV 2006

                          PB 1502 – PLANT DIVERSITY – I (ALGOL., MYCOL. & BRYOLOGY)

 

 

Date & Time : 01-11-2006/1.00-4.00      Dept. No.                                                       Max. : 100 Marks

 

 

 

Part A

 

Answer all the questions                                                                     (20 marks)

 

1. Choose the correct answer (5 x 1 = 5 )

 

1. ­­Microscopic free-floating forms are called
2. a) planktons b) benthos c) epilimnous   d) hypolimnous
3. Match A) Coenobium B) Cell division C) Coenocyte  d) Cystocarp  with
4. i) Cyclotella ii) Polysiphonia  iii) Volvox  iv) Vaucheria
5. a) A-iii, B-i, C-ii, D-iv b) A-iii, B-i, C-iv, D-ii
6. c) A-iii, B-iv, C-i, D-ii d) A-iii, B-ii, C-i, D-iv
7. Statement A: In Puccinia, the life cycle involves Wheat and Barberry

Statement B: Uredinal stage is seen in Wheat plant

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

4. Which of the following is used in the production of antibiotic
5. a) Neurospora b) Peziza c) Colletotrichum         d) Penicillium 
6. The female sex organ of bryophytes is known as
7. a) antheridium b) carpogonium c) archegonium                        d) oogonium

 

1. State whether the following are True or False (5 x 1 = 5 )

 

6. Laminarin and mannitol are the chief food reserve products of chrysophycophyta.
7. Anabaena species exibits isogamous type of sexual reproduction.
8. The cell wall of all fungi is made up of chitin and cellulose.
9. Colletotrichum is an obligate parasite.
10. The antheridium of Anthoceros is embedded in the gametophyte.

 

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

 

11. In algal lifecycles, if both haplophase and diplophase are equally represented, the type of lifecycle is said to be ______ or ______ cycle.
12. In ________ the types of spores within the cystocarp are said to be ________.
13. Budding is a common method of reproduction in ______ _______
14. Red rot of sugar cane of caused by _________ ________.
15. The members of Anthoceratopsida are called ______ because of the presence of horn-like ______.

 

 

 

 

 

 

 

 

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

 

16. Write down any two differences between prokaryotic and eukaryotic cells.
17. What is a coenobium?
18. Define an obligate saprophyte with an example.
19. What are crustose lichens?
20. Describe the archegonium of

 

 

Part B

 

Answer any five of the following in about 350 words. Draw necessary diagrams.

(5 x 8 = 40)

 

21. Write down the general characteristics of algae. Add a note on special habitats of algae.
22. Describe asexual reproduction in
23. Give a schematic representation only of the lifecycle of
24. Discuss in brief about the economic importance of Fungi.
25. Briefly explain about the life cycle of Albugo.
26. Write notes on the structure and reproduction of Neurospora.
27. Enumerate the salient features of Bryopsida.
28. Give an account on the structure of gametophyte in Marchantia.

Part C

 

Answer the following questions in about 1500 words. Draw necessary diagrams

(2 x 20 = 40)

29. a) What is isomorphic alternation of generations? Explain this term with reference to the lifecycle of Ectocarpus.

 

(or)

 

1. Write short notes on :
2. salient features of Pyrrophycophyta ii. Cell structure in Cyclotella

iii. Biofertilizers                                   iv. Antheridium of Bryophytes.

 

30. a) Explain in detail about the lifecycle of Puccinia graminis.

 

(or)

 

1. Describe the gametophyte and sporophyte of Funaria.

 

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