LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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

FIRST SEMESTER – NOVEMBER 2010

                    PB 1505/PB 1502 /PB 1500- PLANT DIVERSITY – I (ALGOLOGY, MYCOLOGY, BRYOLOGY)

 

 

 

Date : 10-11-10                     Dept. No.                                                    Max. : 100 Marks

Time : 1:00 – 4:00

 

         PART – A(20 marks)

 

ANSWER ALL QUESTIONS:                                                                  

1. Choose the Correct Answer:                                     (5 x 1 = 5)

 

1. Agar-agar is manufactured from
2. Ectocarpus b) Polysiphonia        c) Sargassum                       d) Gelidium
3. When Filaments of Anabaena break in small pieces of two or more cells, they are called
4. Hormospores b) Hormogonia         c) Hypnospores        d) Hormocysts
5. The habit of Volvox is
6. a) Unicellular b) Filamentous         c) Thalloid                 d) Colonial
7. Fungi which obtained food from dead organic material is called
8. Parasitic b) Saprophytic                      c) Symbiotic              d) Predacious
9. The endophytic algae present in the thallus of Anthoceros is
10. a) Nostoc b) Vaucheria             c) Oscillatoria                        d) Volvox

 

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

 

6. The fungus which is important in genetic studies is Rhizopus.
7. Members of Hepaticopsida are popularly known as liverworts.
8. The Zoospore of Albugo is reniform.
9. Elaters are cells with spiral thickening that help in dispersing spores.
10. The brown alga Ectocarpus contains a brown pigment called as Phycocyanin.

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

11. Lichen which possess leaf like thalli with lobed margins are called …………………..
12. When motile gametes taking part in fusion are different in size, it is known as ………..
13. Thallus with multinucleate, aseptate condition is said to be …………………
14. The fruiting body of Polyporus is known as ……………………………………………
15. The central fertile region of capsule of Funaria is called ………………………………
16. Answer ALL, each in about 50 words:                       (5 X 1 = 5)
17. What is Protonema?
18. Write 2 lines on Heterocyst.
19. What is Budding?
20. Comment on Biofertilizers.
21. Write any 2 economic importance of Algae.

PART – B

 

Answer the following each within 500 words.

Draw diagrams or flowcharts wherever necessary.                                            (5 X 7 = 35 marks)

 

21. Explain any two life cycle patterns in algae. Substantiate your answer with schematic representation.

(OR)

Give the salient features of Chlorophycophyta.

 

22. List five salient features of Vaucheria.

(OR)

Draw and describe the sporangia of Ectocarpus.

 

23. Describe briefly any 3 sexual fruiting bodies you have studied in the fungi.

(OR)

Write short notes on:

1. Nutrition of Fungi         b) Vegetative reproductive structures in fungi.

 

24. Explain briefly the structure of thallus of Lichens.

(OR)

Explain the external and internal structures of the basidiocarp of Polyporus.

 

25. Describe the Sporophyte of

(OR)

Comment on the sex organs of Bryophytes.

 

PART – C

 

Answer any three of the following each within 1200 words.

Draw diagrams or flowcharts wherever necessary.                                         (3 X 15 = 45 marks)        

26. Write any three different kinds of a sexual reproductive methods in algae.
27. Trace the Triphasic life cycle of Polysiphonia.
28. Describe the salient features of any 3 classes in fungi.
29. Explain the life cycle of Rhizopus.
30. Compare the Sporophyte of Marchantia and Anthoceros.

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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

FIRST SEMESTER – APRIL 2011

PB 1505/PB 1502 – PLANT DIVERSITY – I (ALGOLOGY, MYCOLOGY, BRYOLOGY)

 

 

 

Date : 19-04-2011              Dept. No.                                           Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A (20 marks)

Answer ALL questions

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

 

1. Match [A] Cyanophyceae[B] Chlorophyceae [C] Phaeophyceae [D] Bacillariophyceae

[i] Chloroplast       [ii] Frustule           [iii] Laminarin          [iv] Prokaryotes

(a) A –iv,  B-i,  C-iii, D- ii                        (b) A- i,  B- ii,  C –iii,   D- iv

(c) A- iv,  B-iii,  C– ii, D –i                       (d) A – iii,  B – ii,  C – iv,  D – i

2. Statement A – Ectocarpus has heterotrichous condition.

Statement B – The gametophyte of Ectocarpus  produces haploid zoospores.

(a) Statement A is incorrect and B is correct      (b) Statement A is correct and B is incorrect

(c)  Both statements are correct                          (d) Both statements are incorrect.

3. Pick the odd one out based on mode of nutrition

(a)  Rhizopus                    (b) Neurospora               (c) Saccharomyces                (d) Puccinia

4. Statement A –  Polyporus is commonly called the bracket fungus

Statement  B – The pore surface is lined by the hymenium

(a) Statement A is incorrect and B is correct     (b) Statement A is correct and B is incorrect

(c) Both statements are correct                         (d) Both statements are incorrect.

5.   Peristome  aids in spore dispersal in

(a) Marchantia                 (b) Anthoceros              (c) Albugo                   (d) Funaria

1. State whether the following statements are TRUE or FALSE : ( 5 x 1 = 5 marks)
2. Red algae are predominantly marine in distribution.
3. Anabaena is a heterocystous cyanobacterium.
4. Ascogenous hypha is monokaryotic.
5. Albugo causes white rust disease in wheat.
6. The sporophyte of Anthoceros is independent.

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

11. Oogamous sexual reproduction is characterized by non motile —————-and motile ————–.
12. Volvox reproduces asexually by specialized cells called—————-.
13. Dolipore septum is seen in the hypha of ————– group of fungi.
14. Red rot of sugarcane is caused by ———————- ————–.
15. Sex organs of Marchantia are borne on —————— and ——————.

 

1. Answer the following, each within 50 words only :                                          ( 5 x 1 = 5 marks)
2. List any four characteristic features of Rhodophyceae.
3. Comment on the structure of the diatom cell.
4. How are fungi equipped for heterotrophic nutrition?
5. Mention the components of lichen thallus and the function of each partner.

20.Why are bryophytes called the amphibians of plant kingdom?

 

PART- B

 

Answer the following, each answer within 500 words; Draw diagrams wherever necessary.

   (5 x 7 = 35 marks)

21. (a) How do algae reproduce by asexual means ?

OR

(b) Draw and describe the prokaryotic cell structure in blue green algae.

 

22. (a) Describe sexual reproduction in Vaucheria.

OR

(b) Describe the thallus of Polysiphonia.

 

23. (a) Bring out different groups of fungi based on mode of nutrition.

OR

(b) Give an account of the asexual reproduction in Fungi.

 

24. (a) How does Neurospora reproduce asexually ?

OR

(b) Explain the structure of Polyporus basidiocarp.

 

25. (a) Draw labelled diagram only of the internal structure of Funaria capsule. Add a note on spore

Dispersal.

OR

(b) Describe the internal structure of Anthoceros gametophyte.

 

PART – C

 

Answer any THREE of the following, each within 1200 words.    Draw diagrams wherever necessary.

    (3 x 15 = 45 marks)

 

26. What are the various life cycle patterns encountered in algae? With suitable examples, give the

scheme and explain any one.

 

27. Give a detailed account of the economic importance of algae, including information from all the

groups you have studied.

 

28. Describe the structure of fruiting bodies formed in fungi.

 

29. Describe the life cycle of Puccinia graminis.

 

30. Give a comparative account of the gametophyte of Marchantia and Funaria.

 

 

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