LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

VE 01

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

FIRST SEMESTER – April 2009

PB 1502 – ALGOL., MYCOL. & BRYOLOGY

 

 

 

Date & Time: 20/04/2009 / 1:00 – 4:00          Dept. No.                                                          Max. : 100 Marks

 

 

PART – A (20 Marks)

1. Choose the correct answer:                           (5 x 1 = 5)
2. A motile flagellate asexual cell is known as
3. zoospore b) zygospore    c) conidiospore            d) tetraspore
4. Cell wall in algal cells consists of
5. Chitin b) cellulose      c) cutin                        d) suberin
6. ‘Black rust’ of wheat is caused by
7. Rhizopus b) Neurospora c) puccinia       d) polyporus
8. The sporophytes of Bryopsida are characterized by the presence of
9. Rhizoids b) scales           c) pseudoelaters          d) operculum
10. Antherozoids in Funaria are
11. Spirallycoiled b) quadriciliated          c) aciliated       d) biciliate
12. State whether the following statements are TRUE or FALSE: (5 x 1 = 5)
13. In oogamy, one of the gametes is non-motile.
14. Algae growing on rocks are called planktons.
15. Anthoceros has symbiotic association with blue-green algae.
16. Zygospores are produced in colletotrichum.
17. The female sex organ of bryophytes is called archegonium.

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

11. The haploid spores of Ectocarpus are called __________________.
12. In bryophytes, mucilaginous cavities are seen in ___________________.
13. In Rhizopus, the sexual reproduction leads to the formation of _______________ spores.
14. The symbiotic N₂ fixing prokaryotic alga is _________________.
15. Colletotrichum belongs to the class ____________________.
16. Answer the following within 50 words: (5 x 1 = 5)
17. Distinguish between epipelic and epilithic algae.
18. What are obligate parasites?
19. Write down the systematic position of cyclotella.
20. What is dikaryotization?
21. List any four features of Hepaticopsida.

PART – B

Answer any FIVE within 300 words.

Draw diagrams wherever necessary:                                                                        (5 x 7 = 35)

21. a) Give an account of the salient features of Blue-greenalgae.

(OR)

1. Discuss the life cycle pattern in Algae.
2. a) Describe the cell structure of Anabaena.

(OR)

1. Give an account of asexual reproduction in Ectocarpus.
2. a) Bring out the salient features of fungi.

(OR)

1. b) Describe the asexual reproduction in Albugo.
2. a) Write notes on the structure and reproduction of Rhizopus.

(OR)

1. b) Enumerate the salient features of Anthoceratopsida.
2. a) Write notes on the economic importance of bryophytes.

(OR)

1. b) Give an account on the structure of Funaria

PART-C

Answer any THREE, each within 1,200 words.

Draw diagrams wherever necessary:                                                                      (3 x 15 = 45)

 

26. Give an account of classification of algae proposed by Harold C Bold, mentioning the salient features of each division.
27. Explain the general characteristics and various habits of Algae.
28. Describe the life history of polysiphonia.
29. Descirbe the life cycle of puccinia graminis.
30. Explain the structure of gametophyte of Anthoceros.

 

 

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