LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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

THIRD SEMESTER – APRIL 2011

PB 3506/PB 3502 – ANGIOSPERM TAXONOMY, ECO.BOTANY & EMBRYOLOGY

 

 

 

Date : 12-04-2011              Dept. No.                                                    Max. : 100 Marks

Time : 1:00 – 4:00

 

PART- A (20 MARKS)

Answer ALL Questions

I  Choose The Correct Answer                                                                                    ( 5X1=5)

1. Gynophore is absent in:
2. Capparis               Cadaba                                c. Creteva          d. Cleome
3. Linnaeus classification is based on_________ characters:
4. Fruit Molecular   c. Sexual    d. Vegetative
5. Tapetum is a _________ tissue:
6. Nutritive                 Generative                           c. Protective                d. Vascular
7. Crocus sativus is commonly known as:
8. Turmeric                          Cumin                       c. Bay leaf        d. Saffron
9. Tetra- hydra cannabinol is present in:
10. Cocoa       Opium                     c. Ganja                       d. Datura

II State whether the following statements are true or false:                                                (5×1=5)

6. Thalamiflorae is placed under subclass Gamopetalae.
7. Trilocular syncarpous ovary is a characteristic feature of Euphorbiaceae.
8. Spur in Orchidaceae is a modification of labellum.
9. Heterostyly facilitates cross pollination.
10. Finger millet is botanically known as Eleusine corocana.

 

III  Complete the following:                                                                                                       (5×1=5)

 

11. Misidentification of names by an author is cited as ______________
12. Monophyletic taxa are derived from ____________________
13. Seedless fruits develop due to _________________________
14. Capscisin is found in ___________________________
15. Binomial of Sal is ___________________________________

 

1. Answer the following, in fifty words each:                                                    (5×1=5)

           

16. What is phylogenetic system of Classification?
17. Give any four requirements for Valid publication.
18. Write the difference between cereals and millets.
19. List the features of Moth pollinated flowers.
20. What are the medicinal uses of Belladona?

PART – B

Answer the follwing each within 350 words,. Draw diagrams wherever necessary

                                                                                                                                              (5×7=35)

21. a) Explain the techniques involved in Molecular Systematics.

(OR)

1. b) What are the different types of keys? How do you write a good and effective key?

 

22. a) List the economically important plants with binomial name and uses in the family Solanaceae.

(OR)

1. b) Write the salient features of the family Orchidaceae with necessary illustrations.
2. a) What are pulses? Write the scientific name, family and morphology of useful part of three pulses.

(OR)

1. b) What are the medicinal uses of Indian periwinkle, Sweet flag and Asafoetida

 

24. a) Describe microsporogenesis with illustrations.

(OR)

1. b) Give an account of modes of cross pollination.
2. a) Describe the process of double fertilization.

 

(OR)

1. b) Explain any two types of endosperms.

PART –C

Answer any three Questions. Each answer with in 1500 words, draw the diagrams wherever necessary.                                                                  (3×15=45)     

26. Discuss the usefulness of Biochemical tools in classification
27. Describe the vegetative, floral and fruit features of the family Cucurbitaceae. List any ten plants of economic importance from this family.
28. Define essential oils. Discuss the three different sources of essential oils you have studied.
29. Explain the structure and trace the development of Polygonum type of female gametophyte.
30. What are the various development stages of Dicot embryo?. How does it differ from that of Monocot embryo?

 

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