LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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

IB 41

THIRD SEMESTER – APRIL 2007

PB 3502 – ANGIO. TAXONOMY & EMBRYOLOGY

Date & Time: 21/04/2007 / 1:00 – 4:00 Dept. No. Max. : 100 Marks

PART – A (20 marks)

Answer all the questions.

I Choose the best answer (5 x 1 = 5)

1.Attributes correspond to

Characters b. Genus c. Species d. Taxon

Find the odd one out
Ixora b. Catharanthus c. Datura d. Phyllanthus

3.The morphological nature of the edible part in apple is

pericarp b. receptacle c. mesocarp d. endocarp

Pollination taking place between two flowers borne by two separate plants of the same

species is known as …..

Geitonogamy b. Xenogamy c. Homogamy Cleistogamy

A pollen is best defined as a
male gamete b. microspore mother cell
partially developed embryo d. partially developed male gametophyte

II State whether the following statements are true or false. (5 x 1 = 5)

Archechlamydeae refers to polypetalous nature.
Aloe vera belongs to the family Poaceae.
Eucalyptus oil is employed in the floatation process for the separation of minerals

from their ores.

Double fertilization means the fusion of one male gamete with the egg and the other

with secondary nucleus.

In anatropus ovule the micropyle and chalaza are in straight line with funicle.

III Complete the following. (5 x 1 = 5)

Anthers arranged in two different sizes in a flower is called as ————–.
Dioecious, tricarpellary, superior ovary are characteristic to the family ————.
The oil derived from the waste of the bark peeling process of ——————– is

used as a carminative and astringent.

When the gynoecium matures earlier than the anthers, the condition is ————-.
The process by which seedless fruits are produced is known as ———————.

IV Answer the following, each within 50 words. (5 x 1 = 5)

Write short notes on Cryptogamia
What are polygamous flowers?
Distinguish between spices and condiments.
What is pollen kitt ?
Differentiate chalazogamy from mesogamy.

PART – B

Answer any FIVE of the following, each not exceeding 350 words. Draw diagrams and flow charts wherever necessary. (5 x 8 = 40)

Explain the classification of dicots by Bentham and Hooker.
Bring out the salient features of the family Cucurbitaceae.
Describe the inflorescence in Euphorbiaceae.
Explain the economic importance of any 2 cereals and 2 millets.
Write the botanical name, family, morphology of useful parts and uses of cotton,

jute, sandal and pepper.

Give an illustrated account of development of microsporangium.
What is an endosperm? Describe the development of Nuclear endosperm.
Briefly explain the conditions that promote cross pollination.

PART – C

Answer the following, each not exceeding 1500 words. (2 x 20 = 40)

(a) With suitable examples explain how biomolecules are useful in

biosystematics?

(b) Compare the floral characters of Rubiaceae, Apocyanaceae and Solanaceae in

a tabular column.

30 (a) Describe the structure and development of Polygonum type of embryosac.

State how it is different from Allium and Peperomia types.

(b) Describe the development of a typical monocot embryo.

Go To Main page

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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

IB 46

FIRST SEMESTER – APRIL 2007

PB 1502 – ALGOL., MYCOL. & BRYOLOGY

Date & Time: 24/04/2007 / 1:00 – 4:00 Dept. No. Max. : 100 Marks

Part A

Answer all the questions (20 marks)

Choose the correct answer (5 x 1 = 5 )

The pigment characteristic of Rhodophycophyta is:
a) Phycoerythrin b) Phycocyanin c) Fucoxanthin d) Carotene
The term gonidium is associated with
a) Vaucheria b) Volvox c) Anabaena d) Diatoms.
Budding is seen in
a) Saccharomyces b) Pucinia c) Rhizopus d) Albugo
Which of the following is a coprophilous fungi?
a) Colletotrichum b) Peziza c) Fusarium d) Aspergillus
The female sex organ of bryophytes is called
a) Ascogonium b) Oogonium c) Archegonium d)Carpogonium

State whether the following statements are True or False (5 x 1 = 5 )

Algae growing on rocks are called planktons.
Mitospores are produced from unilocular sporangia.
Taphrina is a obligate parasite..
All mushrooms belong to basidiomycetes only.
Anthoceros has symbiotic association with blue-green algae.

III. Complete the following (5 x 1 = 5)

_____ and ______ are the prominent food reserve products of brown algae.
Diatom cells are also referred to as _________.
Sexual reproduction in Rhizopus leads to the formation of _______
Colletotrichum belongs to the class ________.
Apophysis, theca and __ are the three parts of Funaria

Answer the following in about 50 words (5 x 1 = 5)

Distinguish between coenobium and coenocyte.
Write down the systematic position of Vaucheria.
Define heterotrophic mode of nutrition.
Mention any two methods of asexual reproduction in yeast
List any four features of Hepaticopsida.

Part B

Answer any five of the following, each in about 350 words. Draw necessary diagrams.

(5 x 8 = 40)

Compare and contrast the salient features of Blue-green algae
Write about any four habitats of aquatic algae.
Describe the cell structure of
Give the schematic representation only of the life cycle of
Write notes on the asexual reproduction in white rust fungi.
Briefly describe the structure of Polyporus and draw its life cycle.
Explain the structure of sporophyte on Funaria.
Write notes on the economic importance of bryophytes.

Part C

Answer the following questions in about 1500 words. Draw necessary diagrams

(2 x 20 = 40)

Enumerate the general characteristics of algae. Write about the various habits of algae.

(or)

Describe the life history of Polysiphonia.

Describe the life cycle of Puccinia graminis.