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)
- Gynophore is absent in:
- Capparis Cadaba c. Creteva d. Cleome
- Linnaeus classification is based on_________ characters:
- Fruit Molecular c. Sexual d. Vegetative
- Tapetum is a _________ tissue:
- Nutritive Generative c. Protective d. Vascular
- Crocus sativus is commonly known as:
- Turmeric Cumin c. Bay leaf d. Saffron
- Tetra- hydra cannabinol is present in:
- Cocoa Opium c. Ganja d. Datura
II State whether the following statements are true or false: (5×1=5)
- Thalamiflorae is placed under subclass Gamopetalae.
- Trilocular syncarpous ovary is a characteristic feature of Euphorbiaceae.
- Spur in Orchidaceae is a modification of labellum.
- Heterostyly facilitates cross pollination.
- Finger millet is botanically known as Eleusine corocana.
III Complete the following: (5×1=5)
- Misidentification of names by an author is cited as ______________
- Monophyletic taxa are derived from ____________________
- Seedless fruits develop due to _________________________
- Capscisin is found in ___________________________
- Binomial of Sal is ___________________________________
- Answer the following, in fifty words each: (5×1=5)
- What is phylogenetic system of Classification?
- Give any four requirements for Valid publication.
- Write the difference between cereals and millets.
- List the features of Moth pollinated flowers.
- What are the medicinal uses of Belladona?
PART – B
Answer the follwing each within 350 words,. Draw diagrams wherever necessary
(5×7=35)
- a) Explain the techniques involved in Molecular Systematics.
(OR)
- b) What are the different types of keys? How do you write a good and effective key?
- a) List the economically important plants with binomial name and uses in the family Solanaceae.
(OR)
- b) Write the salient features of the family Orchidaceae with necessary illustrations.
- a) What are pulses? Write the scientific name, family and morphology of useful part of three pulses.
(OR)
- b) What are the medicinal uses of Indian periwinkle, Sweet flag and Asafoetida
- a) Describe microsporogenesis with illustrations.
(OR)
- b) Give an account of modes of cross pollination.
- a) Describe the process of double fertilization.
(OR)
- 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)
- Discuss the usefulness of Biochemical tools in classification
- Describe the vegetative, floral and fruit features of the family Cucurbitaceae. List any ten plants of economic importance from this family.
- Define essential oils. Discuss the three different sources of essential oils you have studied.
- Explain the structure and trace the development of Polygonum type of female gametophyte.
- What are the various development stages of Dicot embryo?. How does it differ from that of Monocot embryo?
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