Ql.

Comment on the characteristics of Archaea, Bacteria and Eukarya.

Explain the following steps of Nitrogen fixation and name the bacteria
involved in each process •
Ammonifcation, Nitrification and Denitrifcation

With the help of graphic presentation, explain the Isomorphic and
Heteromorphic life cycle.

Draw well-labelled floral diagrams of a pentamerous actinomorphic
flower showing the following conditions of stamens
Obdiplostemonous and pseudo-obdiplostemonous conditions of stamens,
each one in a separate floral diagram.

Discuss briefly the Inter-situ, Ex-situ and In-situ conservation.

"India is a top megadiverse country with 2 hottest Hot spots out of
25 Hot spots." Justify the statement.

Describe the economic importance of Gymnosperms.


Discuss the morphological nature of sporocarp of Marsilea.


Q2.(a) Write a detailed note on sustainable utilization of Bioresources and

ecosystem research.

Explain the mode of virus infection in T-even phage and Lambda

phage.

Explain the main steps of"Telome theory".


Q3. Describe the role of bacteria in agriculture, medicine and industry.

"Vessels of Gnetum are different from the vessels of Angiosperms in

origin." Explain critically.

"All viruses are constructed according to geometrical rules of symmetry." Explain critically.

Give the name of the causal organism, symptoms and measures to

control a plant disease caused by a bacterium.



Q4. Describe the range of thallus structures in Lichens. Lichens are rare or absent in cities. What conclusion can be drawn from this?

Explain the morphological nature of ovuliferous scale of Pin us.

Discuss briefly the distribution of Cryptogams in India and their

economic potential.


Q5.

Distinguish between the following:
Rust and Smut
Cladode and Phyllode

Differentiate between the following:
Isokont and Heterokont
Centric and Eccentric growth rings

Draw well-labelled diagrams of the following:
Flower showing androphore and gynophore
Winged pollen of Pinus

Distinguish between the following:
Monoxylic and Pycnoxylic stem
Medullary and Cortical vascular bundles

Differentiate between the following

Descending and Ascending imbricate aestivation
Hypanthium and Hypanthodium

Draw well-labelled diagrams of the following
Male flower of Euphorbia
Tyloses

Discuss briefly the following
Taxonomic position of Caytoniales
Peristome teeth of Funaria


Explain briefly the following
Coenocytic mycelium
Parasitism in fungi



Q6. Write about the following

Explain the progressive sterilization of the sporogenous tissue in
Bryophytes.

Theory of Endemism

Taxonomic Hierarchy

Q7. 'Ranalisma' forms a connective link between Dicotyledons and
Monocotyledons. Discuss it critically.

Describe the various stages of development of exine of pollen wall. Add a note on the importance of sporopollenin.

South Pacific Ocean is considered as the "Cradle home of primitive
vesselless Angiosperms". Write the names of such plants.

Q8. Draw the ultra structural diagram of Heterocyst.

Draw the floral diagram of Orchid of Monandrae group.

Write notes on the following
Totipotency
Cybrids
Symmetry and differentiation
Apomixis