C. S. E-Mains 2002: Botany
Paper-I
Section-A

Answer any three of the following in not more than 200 words each: 20 × 3 60

Recent studies reveal that mesosomes are artifacts and not true structures. Discuss.

What is heterospory? Discuss seed habit in ptendophytes giving suitable examples.

Describe the ultra structure and role of heterocyst in blue-green algae.

Describe the economic importance of bryophytes giving suitable examples.

Answer the following questions

What are biosensors? Describe the applications of microbiology in industry.

What are mycorrhizae? Describe economic potential of mycorrhizal fungi in agriculture and forestry. 30 × 2 60

What is apogamy? Describe the structure and arrangement of sex organs in bryophytes with the help of suitable diagrams. 60

Answer the following questions

Differentiate between hybrids and cybrids. How are cybrids obtained?

What is callus? Describe the process of differentiation from callus. 30 × 2 60

Section-B

Answer any three of the following in not more than 200 words each: 20 × 3 60

What are progymnosperms? Describe with examples their morphology.

Differentiate between velamen and exodermises.

What is Krantz anatomy? Where do you find it? Describe its structure and importance.

Write an account on Shibpur Botanical Garden and Royal Botanic Gardens, Kew (England).

What is polyembryony? Describe the practical value of polyembryony. 60

Answer the following questions

What is palynology? Describe the applications of palynology.

Describe the origin of wheat, maize and rice. 30 × 2 60

Give salient features of flower of the following families. Give economic importance of three plants from each family 15 × 4 60

Ranunculaceae

Euphorbiaceae

Dipterocarpaceae

Orchidaceae