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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034
B.Sc. DEGREE EXAMINATION PLANT BIOLOGY AND PLANT BIOTECHNOLOGY
THIRD SEMESTER NOVEMBER 2017
PB 3506 ANGIOSPERM, TAXONOMY, ECO.BOTANY EMBRYOLOGY
Date: 07-11-2017 Dept. No. Max. 100 Marks
Time: 09:00-12:00
PART-A
Answer the following, each within 50 words. (10 x 2 20 Marks)
1. Define natural system of classification.
2. What is authorcitation?
3. Comment on androecium in cucurbitaceae.
4. State the floral morphology of orchidaceae.
5. What is meant by fibre crops?
6. Cite the family and the binomial of groundnut.
7. What is palynology?
8. Define cross pollination.
9. What is syngamy?
10 Define helobial endosperm
PART- B
ANSWER THE FOLLOWING, EACH WITHIN 500 WORDS. DRAW DIAGRAMS AND
FLOWCHARTS WHENEVER NECESSARY x 7 35 Marks)
11 Explain the phylogenetic system of classification (Engler and Prantle)

Give a brief note on the principles of ICBN.
12 Compare the androecium and gynoecium of Rubiaceae and Apocynaceae.

Enumerate the salient features of family Poaceae.
13 Explain how is Opium obtained and how it is used?

Give botanical names of timber yielding plants in India and state their importance.
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14 Explain the development of female gametophyte within the ovule.

Describe the types and modes of pollination.
15 Explain double fertilization and mention its process.

Explain the development and types of endosperms with examples.
PART-C
ANSWER ANY THREE OF THE FOLLOWING, EACH WITHIN1200 WORDS, DRAW
DIAGRAMS WHENEVER NECESSARY . x 15 45 Marks)
16. Describe the principles and advantages of numerical taxonomy
17. Explain the features and economic importance of Euphorbiaceae family
18. Give a brief note on the different sources of essential oil
19. Write an essay on structure of mature anther.
20. Describe the development of dicot embryo and state how it is differ from monocot embryo