LOYOLA  COLLEGE (AUTONOMOUS), CHENNAI-600 034.

M.Sc. DEGREE  EXAMINATION  – ZOOLOGY

third SEMESTER  – APRIL 2003

ZO 3801 / Z  923  environmental  biology

04.04.2003

9.00 -12.00                                                                                         Max: 100 Marks

 

PART – A                          (2 ´ 10 = 20 Marks)

Answer ALL questions.  Answer in two or three sentences.

 

01.    What are soil-forming rocks?

02.    Comment on Edge effect.

03.    What is cryopreservation?

04.    What are Heterotherms?

05.    Differntiate plankton from neuston.

06.    Comment on gene bank.

07.    What is exobiology?

08.    What is paleoecology?

09.    Comment on Red data book.

10.    What are detritivores?

    PART – B                (4 ´ 10 = 40 Marks)

Answer any four of the following.

 

11. Discuss briefly the physical and Chemical characteristics of soil.
12. Explain the need and functioning of a seed bank.
13. Discuss briefly the importance of microbes in relation to human health.
14. Explain the various methods used in the population –
15. Give an account of energy budgeting with suitable example.
16. Discuss briefly about the life support system in space travel.

PART – C                             (2 ´ 20 = 40 Marks)

Answer any two of the following

 

17. Discuss in detail the role of temperature as an ecological factor.
18. Explain the various reason for the reduction of biodiversity with a note on conservation methods.
19. What is biogeochemical cycle? Explain with two examples.
20. Discuss in detail the intra specific relations.

 

 

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             LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – ZOOLOGY

TS 28

THIRD SEMESTER – APRIL 2006

                                                  ZO 3801 – ENVIRONMENTAL BIOLOGY

 

 

Date & Time : 29-04-2006/1.00-4.00 P.M.   Dept. No.                                                       Max. : 100 Marks

 

 

Part A                                     (Answer All)                          10 ´ 2 = 20

1. What are pheromones?
2. Comment on carbon trading and global warming.
3. What are ecological indicators?
4. Define exobiology.
5. Differentiate fertility from fecundity.
6. Explain potential mortality and realized mortality.
7. Comment on carrying capacity.
8. What are edaphic factors?
9. Differentiate home range from territory.
10. With suitable example explain symbiosis.

Part B                                     (Answer any four)                 4 ´ 10 = 40

11. Write notes on forest resources.
12. Explain intraspecific animal association.
13. Highlight hydrologic cycle.
14. Plan out a protocol for cryopreservation and mention its merits and demerits.
15. What are biogeochemical cycles? Explain with carbon cycle.
16. Discuss briefly biofertilizers and biopesticides.

 

Part C                                     (Answer any two)                              2 ´ 20 = 40

17. Write in essay on Wildlife conservation.
18. Describe ecological energetics.
19. Discuss in detail interspecific animal association.
20. Write notes on (1) Energy pyramids     (2) Population dispersion

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

DE 42

M.Sc. DEGREE EXAMINATION – ZOOLOGY

THIRD SEMESTER – APRIL 2008

    ZO 3801 – ENVIRONMENTAL BIOLOGY

 

 

Date : 05/04/2008            Dept. No.                                      Max. : 100 Marks5

Time : 1:00 – 4:00

SECTION-A

Answer ALL                                                                                                           (10×2=20)

1. Comment on phototaxis.
2. What are pheromones?
3. Define the term ecological niche.
4. What is Red data book?
5. Distinguish holoplankton from meroplankton.
6. What is biological magnification?
7. Differentiate fertility from fecundity
8. What are ecological indicators?
9. Comment on carbon trading.
10. What is Cyclomorphosis?

SECTION-B

Answer any FOUR                                                                                               (4×10=40)

1. Describe bio-fertilizers.
2. Write notes on energy pyramids.
3. Describe hydrologic cycle with a flow chart.
4. Write notes on forest resources.
5. Categorize inter-specific and intra-specific relationships.
6. Write a short notes on Chronobiology

SECTION-C

Answer any TWO                                                                                     (2×20=40)

17.Write an essay on wildlife conservation.

18. Discuss sericulture.
19. Discuss the role of temperature as an ecological factor.
20. Elaborate carbon cycle and global warming.

 

 

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