BOT/V/06 Student's Copy
2 0 1 8
Pre-CBCS
5th Semester
BOTANY
SIXTH PAPER
Algae, Lichens, Bryophytes
Full Marks 55
Time 2½ hours
PART A—OBJECTIVE
Marks 20
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 5
Tick the correct answer in the brackets provided 1×5=5
1. Coenobium is found in
Vaucheria
Ectocarpus
Volvox
Chara
/326 1 Contd.
2. Chlorophyll b is found only in
Cyanophyceae
Chlorophyceae
Rhodophyceae
Xanthophyceae
3. Lichens which grow on rocks are called
saxicoles
corticoles
foliose
crustose
4. The spore-producing organ in bryophytes is
foot
seta
capsule
archegonium
5. Which one is not the characteristic of bryophytes?
Exhibit alternation of generation
Plant body thalloid or leafy
The dominant life cycle is the sporophyte
They are chiefly terrestrial
BOT/V/06/326 2 Contd.
SECTION—B
Marks 15
Write notes on the following 3×5=15
1. Spores and resting phases in algae
2. Sexual reproduction in Rhodophyceae
3. Fruticose lichens
4. Elaters and pseudoelaters
5. General characteristics of bryophytes
PART B—DESCRIPTIVE
Marks 35
The figures in the margin indicate full marks for the questions
1. Describe the general characteristics of Cyanophyceae. 7
OR
Write short notes on any two of the following 3½×2=7
Thallus organisation in algae
Flagellation in algae
Storage products of algae
2. Give an account of the mode of reproduction found in Phaeophyceae. 7
OR
Describe the economic importance of algae. 7
3. Describe the general characteristics of lichens. 7
OR
Write short notes on any two of the following 3½×2=7
Lichens
Crustose lichen
Foliose lichen
BOT/V/06/326 3 Contd.
4. Describe the major classes of bryophytes with their characteristic features. 7
OR
Compare the structure of sporophyte of Riccia and Polytrichum. 7
5. Discuss the origin and evolution of sporophytes in bryophytes. 7
OR
Write accounts on any two of the following 3½×2=7
Bryophytes as indicator of pollution
Fossil bryophytes
Archegonia of Sphagnum