LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – ADVANCED ZOOLOGY & BIOTECH.
SECOND SEMESTER – APRIL 2008
PB 2102 - ESSENTIALS OF PLANT BIOLOGY
KL 3
(Also Equal PB 2100/3100)
Date : 25/04/2008
Time : 1:00 - 4:00
Dept. No.
Max. : 100 Marks
PART A
Answer all questions
I.
Choose the correct answer
(20 marks)
(5 x 1 = 5 marks)
01. Heterocysts are associated with the genus:
a) Nostoc
b) Ectocarpus
c) Albugo
d) Aspergillus
02. The correct ordering among taxa I) family II) class III) genus and IV) order in
taxonomic hierarchy is
a) I, II, III and IV
b) II, III, IV and I
c) II, IV,I and III d) III,I,II and IV
03. Statement A: Sclerenchyma cells are living cells.
Statement B: They are involved in mechanical support
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
04. The entry of pollen tube through micropyle is called
a) porogamy b) chalazogamy
c) homogamy d) mesogamy
05. The morphology of useful part in clove is ______________
a) Stem
b) Root
c) young flower bud d) Seed
II State whether the following statements are True or False
(5 x 1 = 5 marks)
06. Lycopodium is included under the subkingdom Chlorota.
07. Numerical taxonomy is based on mathematical calculation of similarity between
groups of organisms.
08. Collateral and open vascular bundles are characteristics of dicot roots.
09. The basal as well as apical cells equally contribute to the development of the embryo.
10.The female inflorescence and young leaves of Papavar somniferum is used as narcotics.
III Complete the following
(5x1 = 5 marks)
11. In Cycas, the female cones are also called as _____________.
12. _________ is a specimen selected to serve as nomenclatural type of taxon when
all the original material is missing.
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13. The subsidiary cells are parallelly arranged in _________ type of stomata.
14. The parietal tissue is not formed in the _____________ type of ovule.
15. _____________ stimulates the flow of saliva and gastric juices thus helps in digestion.
IV. Answer all, each in about 50 words
(5x1 =5 marks )
16. Why Puccinia is called a heteroecious rust?
17. Write notes on legume fruits.
18. Mention the four components of phloem tissues.
19. Distinguish between C and P tapetum.
20. What are spices?
PART B
Answer any five of the following, each in about 350 words. Draw diagrams and flowcharts
wherever necessary.
(5x8=40 Marks)
21. Describe the cell structure and reproduction in Nostoc.
22. Explain the structure of cone of Lycopodium.
23. Describe the floral characters of Amaranthaceae.
24. Bring out the differences between dicot leaf and monocot leaf.
25. What is double fertilization? Describe briefly its importance in plant life.
26. Give an account on different types of angiospermic ovules.
27. With suitable examples mention the economic importance of alcoholic and non-alcoholic
beverages.
28.Give the binomial, family, morphology of useful parts and uses of any two each of
condiments and timber yielding plants.
PART C
Answer the following questions, each in about 1500 words. Draw diagrams and flowcharts
wherever necessary.
(2x20=40 Marks)
29. a) Describe the life history of Ectocarpus.
OR
b) What are permanent tissues ? Describe the various types of simple permanent tissues.
30.a) Briefly describe the Bentham and Hooker’s system of classification. Add a note on its merits
and demerits.
OR
b) Write a detailed account on the structure and development of nuclear, cellular and helobial
endosperms with suitable examples.
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