LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.
SUPPLEMENTARY EXAMINATION – JUNE 2007
PB 2100 / 3100 - ESSENTIALS OF PLANT BIOLOGY
Date & Time: 25/06/2007 / 9:00 - 12:00
Dept. No.
Max. : 100 Marks
PART A
(20 marks)
Answer All questions
I Choose the Correct Answer
( 5 x 1 = 5 marks)
01. Statement A- Cells of Nostoc possess definite nucleus.
Statement B- Because of this feature, they are included in the subkingdom: Chlorota.
a. statement A is correct, but statement B is incorrect
b. statement B is correct, but statement A is incorrect
c. Both A and B are correct
d. Both A and B are incorrect
02. In thalamiflorae the flowers are always
a. epigynous b. perigynous
c.hypogynous
d. perigynous or epigynous
03. Match A- collenchyma, B- fibres, C- sieve plate and D- parenchyma with
i. Callose,
ii. Cellulose,
iii. Lignin,
iv. Pectin
a. A – iv, B – ii, C – i, D – iv
b. A - iv, B – iii, C – ii, D – i
c. A – iv, B – iii, C – i, D – ii
d. A – iv, B – i, C – iii, D – ii
04. The pollinia are present in the plant…
a. Origanum vulgare
b. Asparagus racemosus
c. Cassia alata
d. Calotropis procera
05. Morphine is an alkaloid obtained from the fruits of
a. Cannabis sativa
b. Triticum aestivum
c. Papaver somniferum
d. Sesamum indicum.
II State whether the following statements are True or False
(5 x 1 = 5 marks)
06. Cone of Lycopodium has both microspores and megaspores.
07. Anterior odd sepal is present in Amaranthaceae.
08. In radial vascular bundles, xylem and phloem are found in different radii.
09. The egg apparatus consists of an egg and two synergids
10. The Quinine, an antimalarial drug is obtained from the bark of Ferula asafoetida.
III. Complete the following
( 5 x 1 = 5 marks)
11. Female sex organs of Funaria are called ------------- and they are ---------shaped.
12. The type of inflorescence present in Achyranthes aspera is ------------.
13. Xylem fibres are also called --------- fibres while phloem fibres are also known as
----------- fibres.
14. The embryo sac of -------------- has only one synergid.
15. -------------- ------------- is used as a mosquito and vermin repellant.
IV. Answer all, each in about 50 words
( 5 x 1 = 5 marks)
16. What is megasporophyll? In which genus it is found?
17. What is gynobasic style ?
18. Write down any two differences between dicot leaf and monocot leaf.
19. Write notes on anatropous ovule.
20. Mention the economic importance of Indian Periwinkle.
PART B
( 5 x 8 = 40 marks)
Answer any five, each within 350 words only. Draw diagrams and flowcharts wherever necessary.
21. Describe the asexual reproduction of Aspergillus. Add a note on its systematic position.
22. Describe the internal structure of petiole of Marsilea.
23. What are meristems? Write down their features. How are they classified?
24. Write down the diagnostic characters of the family Liliaceae.
25. With the help of labeled diagrams describe different forms of ovules found in angiosperms.
26. Describe the structure and development of nuclear and cellular endosperm.
27.Write the botanical name, family, morphology of useful parts and uses of Ginger,
Jute, Opium and Clove.
28. Give the economic importance of any two each of cereals and pulses.
PART C
(2 x 20 = 40 marks)
Answer the following, each within 1500 words only. Draw diagrams and flowcharts wherever
necessary.
29 a. What is isomorphic alternation of generations? Explain this with reference to the
lifecycle of Ectocarpus.
OR
b. Give a comparative account of the anatomy of dicot stem and root.
30 a . Give an account of development of microsporangium up to the formation of microspores in
angiosperms.
OR
b. i. Give an illustrated account of family Lamiaceae.(8)
ii. Write floral formula and Floral diagram of Leucas aspera(4).
iii. Write briefly about Linnaeus system of classification(8).
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